They're probably just leveraging the good will they have as the plucky underdog. I personally found the app clunky and that the videos loaded really slowly, but I don't blame them for offering a lifetime subscription.
Either that, or it's just price anchoring and they weren't expecting anyone to spend $300, but it made the other options look cheaper
Isn't it a lot to do with how easy it is to start playing? All you need is something ball shaped and a wall or a bit of grass .You don't need to terraform a whole area like golf, for example.
So it's got no barrier to entry which means people of a lower socioeconomic disposition can play it and they are often disproportionately stressed and angry