If you are using ethereum based wallets like myetherwallet, you must keep your private key secured and be sure not to commit any mistake in copying and pasting. Because others commit mistake instead of pasting eth address, they pasted their private keys in filling up google forms.
For me the best exchanges are Bit-z, Binance and Kucoin. They are relly secured in terms of security. They also have faster transactions compared to other exchanges amd with lower transaction fees.
Be careful with your private key. You might have done a mistake in copying and pasting it into a google form while filling up. Others also experienced that thing, that instead of pasting their eth address, they pasted their private keys.
In my opinion, if I were to choose between airdrops and bounty, I would choose bounty. Bounties are quite long in terms of time for profit but the profit is worth the wait. Airdrops are just very simple task and with a less period of time waiting for your tokens. But tokens in airdrops don't usually come with big amounts.
Every year crypto world is experiencing this kind of happenings. If you are already here for a lot of year, it will seem normal to you because this could be familiar to you. Cypto markets usually rises up ant the end of the Q3 or at the start of Q4. I just based this on the graph from 2015,2016, and 2017.
Compensation for bounty hunters for their effort is good. But if we talk about that the ICO failed. I don't think that they will give off compensation for bounty hunters. I myself is a bounty hunter but before the ICOs start their bounty campaign they already set rules about that thing if the ICO didn't reach its soft cap.