Posting the same thing to 20 different communities is spam imo, even if they aren’t all on our instance. Stuff like this can get your entire instance banned from federating with others, i don’t think this should be supported and the people here seem to agree. There hasn’t been a rule so far but we should probably add something similar to r/monero where you can only advertise every 2 weeks as well as limiting reposts to your own community and a limited amount of others (so cakewallet can post to the cake community and monero for example).