As far as checking for raffle entry users can check their currency after entering a raffle to see the current amount of tickets purchased. An example reponse would be
[21:14:13] <izlbot> Ticket Raffle Opened for All Users. Each ticket costs 1 internetz, and you can buy a maximum of 1 tickets.
[21:14:17] <izlbot> Type !ticket x to enter, where "x" is the number of tickets.
[21:14:25] <@izlsnizzt> !ticket 1
[21:14:30] <@izlsnizzt> !internetz
[21:14:32] <izlbot> internetz : izlsnizzt - 1,336 (1)
In this case the (1) denotes my current amount of raffle tickets.