If you can promote ringtones well, then mobile IQs may be profitable as well.
Anything mobile really. But experienced mobile marketers need only apply. It's not an easy niche.
Google is fine with that, as long the cell submit page complies to their guidelines.
Can anyone get Ringtones.net to convert though? I had converting traffic, switched from Flycell to Ringtones.net - and ended up with close to 400 clicks to the offer..
...without a single conversion.
:ugone2far: