Offering a 'paid lifetime membership' to paysites?

Apparently this is something that CCBill are able to do so im wondering why some sponsor hasnt already tried offering this as a business model?

It seems that surfers want to have non-recurring billing so why not offer them a $250 membership (as a pricing example) to get access to a sites member area for life?

No worries about having to rebill the member, no worries about affiliates losing out (most would go for a 50% cut of $250) and no worries about surfers cancelling then rejoining.

Do you think this is a business model that could work well on porn site memberships if enough sponsors offered it as an option or total business model for their sites?

Regards,

Lee