I really fail to see your problem here. "There is no activity in that community" maybe that is because everyone posts to c/programming instead, causing a negative feedback loop. Crossposting doesn't cost you any engagement.

It's also peak entitlement to berate the guy doing the most amount of work on this instance to keep it active and going for not posting enough content just because you didn't like what the bot told you. A single bot informing people that there are other, more suitable, communities that would benefit from a crosspost isn't spam.

It does add value, I just said what the value is. The bot isn't just something that points out the opensource community, it's for all communities and it just noticed here youre posting about open source which you are

But yeah open-source is one of the communities I've posted less to recently cause I tend to not get things I can post to it from what I normally browse but I can add some more activity there. Been mainly focusing on building up the language communities and communities that don't even get posts in a week normally