Simple way is that there is no giveaway that would be about you sending from your own wallet. The moment that is happening, it's stopped being giveaway. Again, there is no giveaway that does not demand that perform some functions as that performance is always the qualifying role for that giveaway. So, it's basically don't get greedy. There is no free money anywhere.
These kinds of bitcoin and even ethreum this is not a new thing into the platform on youtube and twitter as far as I know even on Facebook too and most likely their targets are the newbie investors because not all the time the knowledgeable right here on our forum because most of us now are enlightened about this kind of transaction but the newbies are not.
Most of the time they are using the names of the large known people investors even the artist just to encourage to makes an investment with their channel and this is the common type of action they usually do to find some victims.
Their platform always needed to send them a bitcoin or eth payment so you can have an entry this is suspicious, right?
A give away with payment to participants on the event?
After the live for sure your money will gone too immediately the same with your hopes that you thing you can earn double or triple your money instantly.