This OP_RETURN proves that size limits are mempool policies, not consensus rules. Broadcast normally via Bitcoin RPC, not out-of-band. Economic incentives matter more than arbitrary byte limits. Mempool filters can't prevent data storage on Bitcoin. See also dust tx 199e6d98c300546a642803a2ffb849dae7dc7b8f9a0df88163cd9fc99033d3c5 for another non-standard example. npub1zmc6qyqdfnllhnzzxr5wpepfpnzcf8q6m3jdveflmgruqvd3qa9sjv7f60