Thought I'd share this conversation from IRC as well, some valid datapoints:
<MyeRs> Entry fee's aren't a good idea in dp. 1- A lot of players are <15 and don't have credit cards to give the money via paypal and 2- There's really 3 GOOD NA teams that everyone knows 1 of them will win, if paying is involved the lesser teams prob wont participate
<Blitz> one potential could be those teams that pay an entree fee are eligible for better prizes
<Blitz> but anyone can play, they just can't win prizes
<Blitz> something to that effect
<Blitz> but yeah, valid points on the age
<Blitz> the 'good' teams is less on an issue
<Blitz> you don't have to only give prizes to winning teams
<Blitz> you can do other cool things, person with most pgp kills in the tourney, best k/d percentage, etc
Text based entry payments could also work and be a good PayPal alternative (via ViciouZ). I'll look into this some.