nostr:npub1excellx58e497gan6fcsdnseujkjm7ym5yp3m4rp0ud4j8ss39js2pn72a nostr:npub1lh273a4wpkup00stw8dzqjvvrqrfdrv2v3v4t8pynuezlfe5vjnsnaa9nk nostr:npub1wnlu28xrq9gv77dkevck6ws4euej4v568rlvn66gf2c428tdrptqq3n3wr nostr:npub1yxp7j36cfqws7yj0hkfu2mx25308u4zua6ud22zglxp98ayhh96s8c399s nostr:npub10vlhsqm4qar0g42p8g3plqyktmktd8hnprew45w638xzezgja95qapsp42 and others.

What about solving op_return with nested PoW? In this case all tx would be mini blocks, with difficulty scaled down from the network difficulty and then multiplied by the bytes in op_return. It should effectively scale the cost of larger arbitrary data in op_return by making miners have to choose if the fee is worth the PoW for the tx and scale the cost of larger blobs.