nothing special, sell it on the market.

Easiest thing they do is add to your steam wallet, check the prices... :) But if you get a full foil set for some game you can craft them for a different thingamabob. Wheee.... :)

They make you rich.

Remember to sell it at the foil price, not the regular price. Lots of money.

They get you chicks and booze.

If you've got fillings and you bite them it hurts.

I can't believe we have evolved to the point when we're inclined to buy foiled DIGITALcards! Shame on you, human kind! Shame on you!

just the same as male nipples

You just got over 15 euros

You will get a Foil Badge on your steam profile.

If you collect all the foil badges in the set, you can craft them a get a foil badge. That's all.

And here I am, thinking that you need lvl 10 for a foil to drop, and I just got L4D2 one while being lvl 6 myself...anything changed I don't know about?

you get tons of moola

sell it on the market.
i think that's the only thing they're good for

You mold them into a hat to wear. It keeps the government from reading your mind.

apparently rare cards that sell really good on steam market.

Look pretty

Nothing, go sell it nao!