Are you serious? The OP is clearly saying that he does not have ethereum in there to set a little gas for sending the tokens to etherdelta, how are you still suggesting him to use metamask without gas?
Metamask allows you to set the minimum possible gas limit and gas price. Before the Cryptokitties I used to set 100k limit and 0.1 gwei.
Yes, and now more than the whole ethereum blockchain is completely saturated, i sent a payment today and it took more than 15 minutes to get the 12 confirmations, and it normaly gets all those confirmations in less than five minutes.
But not it's better to check the current average gas price before depositing, otherwise your transaction will fail immideately and you'll just loose the gas.
And forgive me about asking, but in what airdrops have you been into? Because $100 is a lot of money compared to the crap airdrops that we are seeing in here everyday.