Buy a domain because you can go to another "roads" when you want and keeping the traffic that you build so far.
After buying a domain you can go with these sponsors that offer free hosting:
Brain Cash ($35 PPS or 50% Revshare)
Fetish Hits ($35-$40 PPS or 60%-70% Revshare)
Idol Bucks ($30 PPS or 50% Revshare)
Long Bucks ($25-$35 PPS or 50%-60% Revshare)
Paper Cash ($20-$25 PPS or 50% Revshare) - by request
Payserve (50% Revshare)
Pimp Roll (up to $50 PPS or 50%-65% Revshare)
Royal Cash (50%-60% Revshare)
Serious Cash (50%-60% Revshare)
Serious Partners (50%-70% Revshare)
SexTronix ($35 PPS or 60% Revshare)
Shocking Cash (up to $50 PPS or 70% Revshare) - Invitation Code: 6BA199FA0F267201 (Bonus $35)
Top Bucks (up to $42 or 60% Revshare)