My guess is that only a small number of OP-RETURN-unlimited nodes are sufficient to get those transactions into blocks. Would you agree?
Those nodes will get the transactions into the miners, even if there are millions of OP-return-small nodes. Right?
Yep
Is it true that the more nodes would reject a certain transaction, the higher fee will be needed to get it into a block? Hence making it harder to spam?
Nope.
Logically it makes sense but I guess there will always be nodes with little integrity who would accept the unwanted transaction.
I'm saying: make it harder to spam, not impossible. If a transaction is rejected by some nodes, it is more likely for it to be outpaced by the widely accepted transaction. So in order to make sure it gets into a block, the spammer might need to increase the fee. Especially if he's in a hurry. What am I missing?
