[Lucky]

my opinion : Paid registration sidetrack more people to attract
you are right you need a sponsor
you should allow more paided advertising here
my idea is : Try to keep free accounts and paid a couple of new Rangs of specific bonuses
try to actually create radio to attract listeners
try to found a harvesting of iron xD xD
just a pittance

try to give support multiple languages ​​such as : Czech, Slovak, Deutsch for more people
or try virtual servers