I commonly browse all by new, and I block users who crosspost any given article to more than one other community. To me it’s almost always a sign that they actually don’t care about the topic or contents, but instead their own post count and user recognition.
So, serious question:
There’s a group “Progressive Metal”.
There’s another group “Music”.
I post things to both, but almost all the time when I post to the former I cross-post to the latter because all progressive metal is music (and thus topical) but not vice versa.
Do I get blocked?
Eh, meh, like I’d have to see it. The way you’re explaining it, I probably wouldn’t block. Again, because it seems like you’re trying to enrich communities that mean a damn to you. If you were just flinging shit to be the king of shit, who broke the news of the shit first… yeah, I’d block.