I saw a little of it. Then I saw the offending instances quickly banned. Then I saw a comment from the admin that they didn't like having to implement bans of entire instances, but it became a necessity until admin of those offending instances took action.

I dunno, seems like it is working exactly as intended to me.

And it's far better than a monolithic tech giant. Pointing at Mastodon and calling out spam is utterly silly when compared to the amount of spam on large services. This article reads like a hit piece sponsored by Xitter.