Whoa... I think I finally understood what you're getting at.

So, with the mempool.space approach, it is effectively a universal inclusion rate, and as such, it is intrinsically a high-water mark that is pressured up by all fee market activity.

However, it sounds like you're also saying that since some block producers, like Ocean+Datum or Braiins+Stratum v2, can purposely assert alternate block inclusion preferences/"filters," these choices put downward pressure on "aligned" fee markets.

So what you're seeing is that there are effectively two parallel fee markets at play? One for all-comers, more or less as described by mempool.space; and another for bitcoin spends with some time to spare, where backward-looking timechain-sourced fee rates will effectively include a discount rate over the last N blocks proportional to how many "aligned" miners versus "profit-maximizing" miners are servicing the mempool.

Is that what you're getting at? If that's what you're saying, I think I you kind of just blew my mind, wow!