You may be interested in joining the Fediverse, a federated network of microblogging software (Mastodon, Pleroma, ...). Most of the implementations support all four of these features.

And most of it is free and/or donation-supported.

But of course, you don't get the same people as on Twitter.

I tried Mastodon a couple times. But the lack of search (can only search hashtags) made it hard to find people/discussions.

I use Twitter to follow some publisher/anime bloggers, and there's none on any federated network, at least not anyone relevant.

And people on my Twitter are more chill than the ones I met on Mastodon (and mainly the ones that used Pleroma). I remember 2 times I had problems there:

One was when I mentioned something about Windows, like, just said that I used it, so a few people started offending me (not mocking or joking).

Another time, I posted a picture when I was watching anime on the TV. Someone asked how I took screenshots from the episodes. I said that I just had a script that downloaded from Reddit. The person got furious because 'I was leeching from the community and not contributing'.

So, I dumped the fediverse and I got back on Twitter where, in 10 years, I don't remember something like that ever happening.