There are no free lunches. You want a nice platform? You've gotta pay for it somehow. You want a platform not filled with spam? You gotta keep it clean somehow. Funding and moderation. I really hope that kbin can survive off of donations, and I have already financially contributed fairly heavily in pursuit of that. Ernest is doing the right thing by communicating about these issues early, and often. Part of why Reddit got so fucked up was that there was no community engagement when it came to raising money. That's the nature of all for-profit platforms IMO.
This is where federated, FOSS platforms can do better.