If you are part of the official Trust Wallet newsletter and you did not received such kind of giveaway then do not take part, legit and valid giveaways are first announced on the project's official newsletter, all the other announcement outside of it are questionable, it's very important that you are part of the newsletter or official media channel of the project you are supporting.
In many cases we get various tempting offers from scammers where they try to grab our private key. So i can't go to any link where my private key is mentioned. In fact, those who are new to crypto make such mistakes and as a result they lose their money.