Maybe, these were constant problems with AlertPay that made administrators pay more attention to GDP, or there were other factors that influenced the situation, but GDP gets more popular among HYIP admins. Sportarbs.com HYIP has become one program that added this payment processor:
Sportarbs has added GlobalDigitalPay Payment Processor (owned by London Gold Exchange) as a new deposit form and they have a certified (the highest) status of them.
Besides, they allow all members to convert all their money and deposits at your account to GDP for free.
Until December 31, 2009 withdrawing money from GDP will be three times cheaper than a withdrawal from the Liberty Reserve and Perfect Money payment systems - a saving of USD 1 (or equivalent amount in EUR) per withdrawal.