Hope we are safe with this LinkedIn authentication, just want to be sure ! Nice one.
Why would you authenticated it. If you are not sure. I would not do it for the airdrop. Always follow your instinct.
Feel free to skip the LinkedIn task if you'd like, we figured this one would seem sceptical for some people so we decided to leave it optional as per our privacy policy. You will be leaving out 150 XCV tokens though.

Which exchanges planned ?
We are currently on full #buidl mode to launch our Alpha product in the next several weeks, and since we are still on pre-sale funding, it will take some time until we publicly announce which exchanges we will be listing on. However, stay tuned as we do have some big exchanges in mind of course.
before the exchange, we need to know when the ico start and how much target for the ico later
and for bounties is just social media task and no bitcointalk promotion like signature, translation or others
Whether we launch an ICO or stick to a pre-sale, we'll keep everyone updated so make sure you subscribe to our newsletter or stay tuned on our social medias. We firmly believe that utility tokens like XCV should be distributed as widely as possible for the best network effect, which is why airdrops like this will not be the last. Look out for more!