Limit number of event registrations for each registration type 
We desperately need the ability to limit registrations by the registration type. For example, we will have one event where there is an upper and a lower draw. There is room for 10 players in both draws.
Right now all we can do is say that the max number of players is 20. But that means we could get 15 players in upper and only 5 in lower. So we have to keep an eye on it and go in and manually close the type and hope we do it at the right time. We need this to be automatic.
Thanks in advance!
Released in 5.1
We use the one or more registration types to collect sponsorships for some of our events. Generally we limit the sponsorships to a specific number so it would be beneficial if we could limit these registration types for this purpose. In the interim we use a registration code for these sponsorship registration types to limit the number of sponsorships. It would also be helpful to not permit some registration types from being displayed in the registered attendee list.
Dmitry Buterin commented
Anyone else would find this useful? please comment.