Bowmo Inc (BOMO)

[work-n-hard]

And that doesn't even include MM's like GTSM. As far as I can tell, that is their Bread & Butter.
As far as I can remember, those guys were not around on any OTC stocks that I was ever in, until the GameStop brew-haha.
All of the sudden, Feb/Mar of last year, they showed up on almost all the ones I've been in, and you can watch them whacking away at Bids and driving the PPS down.
I've not heard one retail trader say, that they saw their trade go through those guys.
JMO