Every mempool is a "real mempool". The thing that matters RE:Filters is propagation to the miner that wins a block... Less filtering nodes = more likely spam propagation.
Discussion
Not really, just connect to miners directly
Which is something you might do as an individual, but it's pretty obvious that bitcoin implementations aren't going to hardcode every single miner into the peerlist of every single node. So realistically, whether you have a spammy workaround or not, the implementation that most nodes run matters and the filters still matter.
No they don't. If someone wants a transaction to be mined and it is valid, it will be done. That is the whole way the fee market works.
AND... they would pay more if they need a private mempool to do it. disincentives. You can run circles around this all day, but the reason we're gonna go 1000x on OPreturn spam in the next few weeks, is solely because of Bitcoin Core choosing "bitcoin is a database" as the hill to die on.
Shitcoiners are sharks and yall are choosing to chum the water at the beach.
Why would they have to pay more? That's just not true. Again you're wrong. Highest fee is highest fee. It's not more expensive because you go to some other nodes mempool.
It ends up in blocks and not mempools, it makes everything worse
Yes, it distorts the fee market.