it's not done, not in the same way, right now to put a full jpeg on a block they go directly to miners like Mara, that is more centralized for jpegers wich means if Mara wants they can stop the service, require more money, or stop accepting it. Another important aspect is that miners can be pressured to stop that either by the community and node runners, or by legal agencies. Core by removing the option to filter just gave a free pass to Jpegs and it's saying we, nodes, network accept this, and so miners can go, and well we are just running Core.