I didnt look a whole lot into the site because I did see something about fee's in the terms...I would hope being free there wouldn't be any fee's lol. This was from www.myxer.com
3. TERM, FEES AND PAYMENTS
If you choose to purchase content from Myxer, all payments must be made by you through a charge to your cell phone bill, by a PayPal account, or credit card (VISA, MasterCard, American Express or Discover Card). We do not accept cash, checks or any other payment form. AS BETWEEN YOU AND MYXER, YOU, AND NOT MYXER, ARE RESPONSIBLE FOR PAYING ANY AMOUNTS FOR SERVICES BILLED TO YOUR PHONE, PAYPAL ACCOUNT, OR CREDIT CARD BY A THIRD PARTY WHO HAD ACCESS TO THESE ACCOUNTS, WHETHER OR NOT SUCH AMOUNTS WERE AUTHORIZED BY YOU. You agree to pay all fees and charges incurred in connection with your services (including any applicable taxes) at the rates in effect when the charges were incurred. If Myxer does not receive payment from your credit card issuer or its agent, you agree to pay all amounts due upon demand by Myxer.