well for example, damus relay now only allows a couple messages per minute, that incudes ALL kinds, zaps, likes, follows, profiles, replies.. drafts, for sure would burn this before you even post.
Discussion
How would a user be able to know if/when a relay is throttling?
clients usually cover up the failure.. but most relays will respond back and say why its not currently accepting a particular note so that you would know to retry.