BTW, regarding hobby project vs a business can swallow the costs easily:
My most expensive Invision license now has a renew price of $310 per year.
I have a few dozen websites that we intended to convert to Invision (some Xenforo, some Wordpress). If you multiply say 20 sites by $310 thats a maximum of $6.200 per year. Even if we dont need every component and try to minimize the costs, for a small business thats a considerable amount of money.
Technically, Invision is superior over other solutions like Xenforo, that was the reason for our project, but now has come the time to reevaluate if the few tech benefits outweigh the money and how we should deal with the lowered trust we now have.