jm 9TÝf`#ð:èͽYs¹ki¡&ÁÑØÍöóLYours.org can do that because posts are not done onchain. Every action on memo is onchain, so you kinda need to pay the miners to mine your actions.
https://whatsonchain.com/tx/8f0dab88b8a1f4a19bfd714e75e7074e53d2eeae355c9da40ced86db3ada4297