Don't know how relevant or necessary this will be but I was a fairly active user on the PMD-E group and IRC chat around summer 2013, underage at that time. Most of the people in the chat itself were good people who were just there for the community, we used to hold weekly movie streams late at night and it was really comfy. These were the kinds of people that were just there for the community part, they didn't even do much in the group. Generally the more involved with the group they were,the more of an entitled narcissist they were who believed that they were best friends with PK just because they had some sort of relation or position in the group. Power really does change how people act. Reminds me of the things people would do in that group just to get a scarf and things like that.
It's been a few years and I wasn't super-active but I at least want to share what I experienced, especially considering how things are blowing up now, they aren't specific enough to include people like Marl but I'll give you what I remember. I used a noivern character at the time, just recently announced, and PK and the rest of the upper members would not allow 7th generation pokémon because they could've been second stage and such. Ended up closing before the games even got released. There was definite favoritism in the pokémon used, as though they only knew of like 15-20 pokemon and nothing else. Very stuck-up in what they knew about them too and what they did with their characters. A huge power gap between "users" and "PK's group", and her group was often rude or negative (in a sarcastic fashion) to the users save for one or two people. There were a lot of skilled artists in that room too. I clearly remember one of them showcasing a recently-finished picture of a garchomp with two slicked-down appendages, and then people went on a whole tangent about that for an hour. PK didn't care about the artists much, but she did have full-on conversations with the management people. I tried my best to get a response back from PK whenever they came into the room but all I would get is things like "ok fruit bat", although when i made a fan piece she was positive and responded "awesome! thank you!". Thankfully that's as far as my experience with purplekecleon/glitchedpuppet went.
That was back in 2013 and plenty of things have changed since then, I barely remember anything because it was just for 2 months or so but since this is going on I'd figure to share. Probably sounds like regurgitation at this point although since I had some involvement I figured to share.
Not at all surprised that this is going on, always seemed a bit sketchy.