Talk:Login Rewards/@comment-82.154.106.126-20130615105657/@comment-4719392-20130615110837

Go to warframe.com, log into your account and you'll see the reduced prices on the "buy platinum" page. As for how much time, in-game it says you have 48 hours (see Locky131's screenshot below), but on the website says you have 1 day, so I don't know.

It's a shame it doesn't work for Founder packages.