No they don’t. Why do you think pools would be colluding against them. I don’t get what you’re saying .
Discussion
I don't think they are, but they could... Would seem like they may want some skin in the mining game to help protect their stack.
They need to be running their own nodes more than mining. Nodes enforce the rules.
This for sure, but a pool would be interesting as well, don't necessarily need the overhead of mining, but some fee-less pool to help support the miners? Just thinking out loud, if I had a stack like that what I would be investing in to protect the network