Previous frontpage deal is back
Confirmed stackable on existing memberships. I just bought 4 and extended my current membership by 1 year.

Price is $38 per 3-months with 14% cashback. I bought 3, then used the cashback to buy a 4th. There is a small service fee as well depending on how you pay. But overall, this is the best current deal for GPU if you need to extend. For me, the price/mo came out to roughly $12/mo