Swarm Challenges — Check in, win prizes!

"Please note, that for legal reasons, Swarm Challenges are currently only available to residents of the United States." 😪

The first challenge is to "check in to 2 restaurants or bars between May 31st and June 5th for a chance to win $500 towards a weekend getaway". Curious how many people will end up qualifying for this, and who will be the first sponsor.