Maybe it was all those years outside of Portugal, but in my mind "betinhos" isn't just a certain young wannabe (or even outright) rich person (the outright being common in places like Cascais) but is more generically a middle class person from a middle class background who heavilly signals their well-off status - they're indeed two different kinds, but when it comes to the way they talk they have quite similar styles and run around with an elitist belief that they know better. Maybe it's my working class background (even though I do have a degree and am supposedly middle class myself nowadays) or some kind of hyper-sensitivity to class status signalling from having lived in the UK, but for me the well-off leftwing soft "rebels" from well-off families who behave towards working class party members in a paternalistic way are from the same branch of the tree as the other kind even though they've taken a turn to the left rather than the right.

It does make sense that the "betinhos" from the wannabe rich in the sense you seem to be thinking about vote IL since that party sells an idea of meritocracy (entirelly fake as I can tell you from having worked in the industry from were most of those "gentlemen" from IL come - Finance) which would appeal to the "not yet rich who want to believe they'll get there if they try to emulate what they think are the rich hard enough". Curiously from what I've seen when manning voting boots in Cascais for the Bloco a few elections ago, the real deal upper class "betinhos" probably vote CDS.

I've been a member of the Bloco for 4 years now, in 2 different districts and whilst I spent most of the time in the first couple of years with a "all I know is that I know nothing" posture of watching and learning, I did pay a lot of attention and used a couple of decades of experience gained abroad (in various kinds of companies and various countries) in figuring out new environments, observing how things work between people and even winding people up just to get them to say what they really think, and have seen and heard a lot of elitist and even outright anti-Democratic posture in the Bloco, including from sitting Parliamentary Members I know personnally (I've also seen good things here and there and don't actually think most people there have bad intentions, they're mainly out of ignorance and lack of self-awareness behaving in ways that are elitist, self-serving - not in a greedy way but in an interpret things in ways that avoid accepting that they too sometimes are *gasp* wrong - really reactive, inconsistent and lacking a broader vision, and even with ouright anti-Democratic behaviours).

I've also seen some ridiculous fake leftie stuff from the membership: in one congress I went to most of the speeches from members were of the "we the [some group] want/need X, Y, Z", which is my eyes is just greed disguised as "for the group", whilst the "for the common good" kind of stuff (or at least the stuff worring about groups other than those one is in) were a lot less than what I (naivelly?) expected in a congress of a real Leftwing Party.

I don't know about the class of the voters of the Bloco, all I know is that the leadership of the party at the highest level are all degree-holding people and even the District leadership in the District I live in which contains large blue collar areas and hence an unusally high number of blue collar worker members (still a minority), only a tiny handful of the District Leadership are blue collar.

Maybe it's a wider Portuguese phenomenon, but the tendency of many Middle Class people to think they know better even in subjects they know nothing about and use haughty dialetics to basically bully the less well educated or just ignoring them whilst faking listenning to them rather than really listenning and taking it in what a Working Class person says, even on subjects that the Working Class person does not better, is alive and well in the Bloco, were IMHO I think it's unnacceptable (acceptable in the pro-Elite rightwing, not in a supposedly pro-everybody leftwing party).

This social blindness manifests in some ridiculous ways sometimes: I remember one election where the national leadership (who, by the way, don't seem to listen to anybody else that people from Lisbon and Porto, to the point that councils in the same district felt ignored) sent us a black middle class woman to go campaigning in a poor neigbourhood which had lots of people who were born in Africa and became Portuguese nationals or their children, and she behaved incredibly "middle class woman" with this kind of bland "we understand your problem" talk whilst not really properly empathising with the concerns of those people, whilst the person amongst us really empathising (mainly by getting progressivelly angry at the shit that was being done to them) and coming up with ways to try and help them within the power of a party that had all of one seat in the local assembly was a local guy who didn't at all look like them but had been in some pretty bad State highschools whilst growing up and really knew how life could be for somebody from such neighbourhoods.

(The funny bit was that the lady herself once elected was pretty decent as member of Parliament, she just wasn't at all representative of the people those who put her forward for meeting and seemingly represent, with quite extraordinary socially-blindness only seemed to see as "ethnics" hence they "matched them by ethnicity" - you need to be incredibly socially-deluded to see poor people and think what matters the most is their skin color).

For me the collapse of the vote on the Bloco in the last couple of years as the mainstream parties started falling (which one would expect was a prime time for a leftwing alternative voice to gain votes) did not surprise me in the least given all that I saw from the inside including some interesting talks with my local member of Parliament once I moved to a District capital.

Maybe the party can be pushed and prodded to become more like this Finnish party seems to be, though judging by how self-isolated, elitist and Party-Headquarters centric the current leadership are and how little they listen to the rest (except when an election comes and they need people to go around campaigning, which is when they suddenly remember to tour the "countryside" and talk to the members, though even those "listening" tours are very much in a "important people and little people" structure rather than "open discussion") I don't think it will happen without the old guard - who were the ones who chose to give way to this handpicked "new generation" - cut their legs off.