the adult industry is pretty good!

You could start your own Cell phone service where you will recieve texts, and for a small fee, send them dirty photo's for their phone. Or videos if you have the means.

make the first one free and partner with other adult websites. IF they take a free one, you give their number to other sites to send "promotional offers" to their phone, you get money for each referral.

You'll be filthy rich! PUN INTENDED.