I'm not endorsing their behaviour, but I can imagine myself doing something similar to Pips. I'm just hoping to show an alternative perspective here, maybe it'll make the spam more tolerable for you lol.
I follow basically all the warhammer hobby magazines/communities I come across. They're all still growing, some a little quicker, but honestly there isn't a single clear winner. Since they basically all would benefit from more content and activity, shouldn't I post to several admittedly very overlapping groups?
There's only so much content I can contribute as a single user. I either make an OC post when I've painted something up, or I'll link like the one or two noteworthy news articles for this week lmao. I can't create bespoke content for each instance.
I do want them all of them to succeed, or any one of them to succeed. They're all starving for content most days. But right now, the fediverse just doesn't have the critical mass yet. So how should we grow it?
Eventually, a clear winner will emerge, and I'll probably prune my subscriptions list. But we're in the spring of the fediverse, it's just too early to tell which sprouts will flower best.