Doesn't need to be 100%.

Nobody ever said 100%! That's what core people put in our mouths. We just don't want to relay that stuff, and as a supermajority of the network currently does the same, it severely rate-limits those transactions. The transaction you posted actually proves this point, as it needed to overpay by 3x to be included in the block.

It does if it wants to stop this

It still gets in.