They do not give you cash card codes for OGPlanet. They set up a program with OGPlanet, where you will be sent a coupon code via email. I received mine last night.
To those asking about GamingLagoon
GamingLagoon gives out UGC, Ultimate Gamer's Cards, these can be used for over 200 games and LaTale happens to be one of them. Of course you could custom order a OGP gift card from GamingLagoon as well. Both sites are excellent.
GamingLagoon's Prize section is quite a mess so look around for the UGCs. http://www.gaminglagoon.com/user/prizes/41/1
If you live in the USA, Canada, UK or Australia I suggest you use PrizeRebel. If you live in another country I suggest you use GamingLagoon.