nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqmjex459gdca6clm3hund6d78zn7rck2ava0hvnq00s6sgryn7x9q82pdts
infosec.exchange has a 11,000 character limit, which is big enough that I've never hit the limit.
Smaller limits exist because of a theory that it encourages concise posts. There is ...