i partly agree with this but disagree with the percentage, i do airdrops for so long and thank God they are paying but only 3 out of 5 airdrops that i am engage in. Scamming is not new in the business, you just have to pick nice projects so you could be sure of having a payment at the end of the ICO, but as for me i am joining as many airdrops as possible, don't settle on just 1 or 2, airdrops are not that complicated to engage in.