From the Model Mayhem FAQ:

What is a Gift?
Gift subscriptions are essentially the same as regular subscriptions, and come in Premium and VIP in varying time blocks. Gifts can also be either a one-off surprise or recurring.

Gift billing information is also managed directly from the giver’s Wallet. This is a much more secure way for our generous members to express their love and gratitude for their fellow members!

At this time, gifts have been disabled while we improve our billing system.