The $9.90 USD Topcashback deal has ended - the Gyft $5 offer ($15 purchase required) for new users seems to still be running though.
There is also still 2% cashback for Gyft and the $10 USD Topcashback sign up bonus.
Firstly, be aware that this deal involves a few steps, so it may not be for everyone.
The US cashback site Topcashback has a current special offer for the site Gyft - which is a site that sells a range of gift cards, including Amazon gift cards.
You get a free $15 USD Amazon gift card in the following way:
* You must be a either a new member of Topcashback or a member who has never claimed cashback before (Topcashback allows more than one member per household). If you sign up to Topcashback through a referral link you also get a $10 USD bonus.
* You must click through the Topcashback link (use a clean browser with no ad blocking) and purchase 1 gift card with face value $15 USD from Gyft. Gyft gives new users a $5 USD card for signing up, so you can apply this against your purchase. Gyft warns you that the Amazon gift card is not able to be used outside the US, but it applied ok to my Amazon account.
* Assuming all tracked ok, Topcashback will then pay $9.90 USD cashback within 21 days.
* You can redeem credit from Topcashback as an Amazon gift card with a 2.5% bonus - so you get paid $10.14 USD. Therefore the card ends up being free + 0.14c USD. Alternately, you can take the Topcashback credit as Paypal without the bonus.
If you do everything correct this should result in a free Amazon $15 USD gift card - which you can combine with the $5 credit from the other deal. If you earn $0.10 more from some other transaction (e.g. eBay US, aliexpress or the fiverr deal I mention below) you will also be able to cash out the $10 referral bonus too.
The full terms are given in the main link for the deal - and may be worth a look if you are unsure about anything.
This deal is valid until Friday, November 6, 2015 at 23:59 (I assume US time = PST - which makes it ~7pm tomorrow) or "until stock runs out".
Have you actually received the Gyft card? I've tried buying GCs on that site before and they restrict payment to US accounts (e.g. Paypal, CC, IP Address etc.).