I'm seeing this sort of thing a lot. Impersonator rainbow spam.

Like impersonator accounts that repost old notes maybe (?) with lots of rainbows in the text.

It seems to be on popular notes / accounts.

https://image.nostr.build/69fb19484cd70c49acf536682b65bde2897e2cb74f603547dfc5ac96796f3ce4.jpg