Quote:
Originally Posted by azxten
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Use a service like this...
http://www.proveout.com/r/phone-verification.html
Tie account creation with phone verification. This eventually adds a cost to creating an account when you run out of numbers to use. Also a lot of these services allow you to block virtual numbers from service like Google talk, Skype, etc and payphones.
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I like this idea but would be very costly.
Any other services out there that would accomplish the same thing but cost less?