It's certainly more reasonable if that is the case.

Everywhere I look it says that steam added a 2 hour limit before cards start dropping from games and that's why Idle Master has the relevant settings.

I was wondering if I'm missing something or something has changed because I just played Bioshock: Infinite for just over 2 hours and got all four of its drops as seen in screenshot: http://i.imgur.com/yiCWDtY.png