If it's true then that is very sad. It means there's no real direct access brokers for retail traders. Now it feels that Robinhood isn't that bad after all.
With Robinhood, they screw you in a different way. You get screwed on the execution price which could be even worse and that you won't even know how much worse. At least commissions, you can see how much you got screwed because you can see how much you should've gotten vs. how much you got charged irl as all rebates and commission fees are published. With PFOL, you could've gotten a much worse price from a MM that paid Robinhood to execute your order vs. if you had sent the order directly to the exchanges and let everybody compete for it. With rebates in commissions, with several thousand shares, it's 10's or 20's of dollars but with execution prices, a worse fill by just several cents, you could be out several hundred dollars at least.
So is RH better? I doubt so. We retail traders are screwed no matter what, either in commissions or execution prices. Why? Because we are small and they need to make money. One dollar more in our pocket means one dollar less in theirs and vice versa. Trading is a cut-throat business very much the same like the jungle. Everybody fights for survival. If the lion catches the zebra, the zebra dies. If the zebra escapes, the lion dies.