As one of the guinea pigs, I thought I'd share an update.
I have not had to place over 30 stickers at any location thus far. This is due to the chain c-store simply not selling half of the SKU's that get stickered (a store manager clued me in on that). Average number of total stickers placed is in the teens to mid-20's.
Time per shop (including entering and submitting the report) has been 10-15 minutes. Staff seems very aware of this program and are expecting the visit, so no one has been caught off guard.
No problem with the report, editing times, or them being accepted, even with the lower amounts of stickers being placed. This has been easy money. Of course, this is just my personal experience with the program. My only regret is not taking more.