Hi,
I've written this as Suggestion for future improvements of JomSocial.
1) I'm saying that actually JomSocial limit the number of messages per day. I think could be better if it limit the messages before the reply
2) Often on social communities there are premium users that have less limits than common users (they can upload more pictures, have more friends, etc.). If you change your daily limits page with a table with Joomla User Groups on columns and limits on rows you will have a system that limit differently the user if it's, for example, "Premium"
Thanks!