Earlier quoted context omitted.
$50/month gets you a 12 core 24GB VPS with unlimited traffic on a 1Gbps link on Ionos. https://www.ionos.com/servers/vps $7500/month would get them 150 such servers. Maybe they should cut the AWS costs and hire their developer back. Id be really interested to hear the breakdown of their AWS bill. It would be a crime if they were blowing what money they have giving Amazon 9 cents per gigabyte egress.
If they are self-managing all the extras you get with a decent cloud setup (backups, node failover, load distribution and auto-scaling, multi-region or at least multi-DC for availability beyond single node failures, …), they are going to need an infrastructure person as well as that developer. Preferably two so the one isn't effectively on-call 24/7. And for that multi-DC for availability thing: you might need someon…
What would you prefer, this website eventually shutting down because the donations barely cover hosting costs and there's nobody to maintain it, or the website occasionally going down but otherwise actually being profitable enough that the founder can continue maintaining it on a part-time basis and keeping the site alive?