If your not paying for it, your opinion doesn't really matter much. You can get mad and go elsewhere, but frankly, nobody wants a crowd of people who are fundamentally opposed to compensation.
Also, just to head it off, no one donates. The stats are hilariously awful (<1% conversion) compared to the endless shower of "I always donate to things I like" comments.
speedrun.com has millions of registered runners and many more unregistered spectators. But yes, it is just a glorified UI over google sheets. Speedrun communities almost never use it for the community features like forums (Discord servers are the typical community fixtures), it is mostly just a public place to publish records. Everything on the site is provided by the community. SRC essentially adds 0 value to the community other than "it was the first aggregator, and now it's entrenched".
https://en.wikipedia.org/wiki/National_Basketball_Ass%27n_v.....
My understanding is that anything submitted was also dual-licensed to allow the site to freely use your content however they wish (like most sites out there that accept user content). So they can, for example, distribute the old data without the CC license statement, even if the content is CC-licensed.