Yeah it's kinda beyond me why it's so much at first thought but that's probably just how it is if you want somebody else the infra and the app etc for you. Wouldn't cost much to spin up whats likely a LAMP or similar stack.. But the cost I guess for managing the forum app, SEO, security patches, support, DNS/SSL and infra it makes sense.
I'm in a position these days where I would be happy to chip in for hosting, but I'm also in a position where I have skills and expertise in this area that willing to be offer. For example things can be modernised and save costs but that still takes in investment in time, risks current stability. and probably is just way easier to pay for it. I'm hoping the backup server isn't perpetually running just waiting for the primary to fail as I'd rather help re-arch so it can be scaled up/down on demand.
Otherwise if there are any other sites, services or integrations people would like a hand with just ping me. I suck at front end and UX stuff full disclosure, because I have very little interest in it, but always happy to help with anything related to Coding, (linux) Systems, Networking, Infrastructure (physicals, embedded SBCs, VMs, containers, serverless), CI/CD, security etc. Would it help if there was a better integration for donation? Perhaps one that supports different payment types including crypto? I'd be happy to help with such an integration.