Got an email last week for this offer.
You get put on a waitlist (took 3 days for me) and then you will receive another email asking you to verify your identity (to ensure you aren't double-dipping this promo).
After that, you get $25 USD of XLM that can be instantly traded for an almost 1:1 ratio to Bitcoin, which if you wish, can be sold on Localbitcoins for real money.
$25 worth of crypto for a copy of my passport or license and email address? What could go wrong.