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Is this quite the same from the previous giveaways of such token that leads to some user to be banned for doing some specific tasks? As far as I remembered, it is Pamoldar if I ain't wrong on guessing...
I am curious who will agree to escrow 100 Doge coins which are 20 cents worths 
The OP said "I need Lot of Members to do this task" So it is possible that x number of users need to do this and the total amount is 100x Doge which may be a significant amount. Even so, you can earn this amount of Doge Coins to some Gambling sites that offers a Faucet feature, though you cannot withdraw it to your external wallet...