Sometimes I win handily and get a little experience, sometimes I squeak out a victory and get a lot. How is experience earned?
/u/Reaa over at reddit did some experiments which seems to line up with my experiences:
The primary (only?) factor for experience gained seems to be cards played. Either the more cards you play the more experience, or the more rounds played where at least one card is played. I then imagine there is a multiplier for winning, seems to be about 1.5x.
To date, there is no published formula. Also, since there isn't actually a "number" associated with your experience (just an arbitrary bar), it can't be calculated by players.