Niggles: a GOG wallet type addition had been mentioned at some point, but not sure whats happened since then?.
Anyone else?
Well, there is definitely some development work behind that which may be outside what they are currently busy doing --and it's definitely something easier said than done.
However, I think having the ability to buy and trade some type of "token" could be a good opportunity for both GOG and for people who don't want to keep hitting their cards every time there is an awesome sale and you can acquire 5 games or more for under $20.
However, I imagine that this 'token' type of credit would throw off two things: a) regional pricing being the same; and b) the value of the token at the time of the purchase when exchange rates change.
While I can understand this, how about at least allowing the buyer to choose the amount of a "pre-charge" they can put for GOG. I think that may help with the micro-payment issue.