Lemmy (and reddit to a degree) is not like other social networks where you are lumped into one giant community. It's many communities, and you'll find that you are welcome in some and not welcome in others. That includes your politics and your views.
I don't think I'd be very welcome in a community of conspiracy nuts, especially when I counter everything they say. I think they would remove me from that community at some point, and that's okay, self policing of communities is okay. Sometimes you aren't welcome.
What's the efficiency in taking 30% of almost all game sales on a platform? I know we all love valve, but the efficiency here is having a store that everyone has to use if they want to make sales at all.