Gutcheck Litter Study - anyone else?

Just got into a litter study for GutCheck. I need litter anyway, but it sounded like they plan to give us a larger reward in our panel for the purchase?

If not, not a huge deal. I need to get litter tomorrow on my day off. But how has your experience been recording in a store? I plan to go to the local grocery store in the wee hours of the morning in hopes that it's not a huge deal because I know with larger retailers, sometimes they'll kick you out for recording. Had it happen on a battery study once. Bummer.