If you have German DE/AT/CH users on your site or want to give them offers
then
Phonecash is a good program.
Amateur, Housewife, Affair, Parking Area, Hooker, Teens, Mature, Granny, Gay, Sexcontact, Slaves, over 30 lines you can promote.
They have templates, mobile campaigns, image content, audio and media content for print and TV.
Premium landline, hotlines for mobile and ? 1 Euro hotline "win 10-30 minutes with a lady on the phone"