Re that last boost: Mastodon is hard to get into without a guide and some focused usage.
The things that make it less toxic also make it harder to discover people to follow.
Without people, you just kind of feel like you're tooting into the void. It makes Mastodon a lonely place that you're less likely to return to. I mean, this is why Twitter and Facebook put so much energy into recommendations.
I don't think Mastodon should try to solve this problem. But let's acknowledge the hurdles.