Not as a rule but sometimes. The Witcher, I collected a few cards. The Witcher 2 I think I got them all including Triss. The Witcher III Nor so much except for the Brothels as you got XP. 2 points, but XP is XP. Then there was Yenifer and a couple others. Haven't pursued it in ME. Not aware of it being an option on any of the others I have played. Suppose someone may have come up with a Mod or two.