What does this mean ? SuperRewards Survey !!!

Ok so there are a lots of offer in SuperRewards Survey. I want to do the Blockbuster , but what do Z8games mean when it said Offer reports on a 3 hour delay. or 24 hours ??..

Also I accidentally click on offers , but I didn't not sign up yet so it still show on the status page . When I finish one of my offer , that mean there is a new one on the status page right except I finished that offer for example . right ?