Honestly, I can't recall. I uninstalled F-droid a while back, as I use Obtainium. Have a look around the F-droid page for the app you have installed. There should be a setting somewhere to prevent that app from being automatically updated, maybe to just notify you there's an update ready.

That said, you'll probably be OK if you installed via F-droid, as they have pretty good policies on preventing spammy apps or apps that mine user data.

I'm more concerned for those people that installed via the Play store and are unaware of this change - they'll probably automatically get the newer, shittier versions without even realising it. This is the community's biggest concern about the way this particular dev has sold out their userbase like this.