The pay varies by shop. I think the electronic store shops are far too much work for the pay. The tanning shops pay well, especially the ones that don't require you to sit in the tanning booth and pretend to get a tan!
They have some bar and grill shops where the pay/reimbursement is so-so, but I look at it as a chance to eat at a favorite place and only pay half price.
They have the best deal around here for oil changes. The other MSCs pay $5 or less in fees because they feel you're getting a sweet deal with a free oil change. Well, Bestmark pays $20 or more in fees, plus reimbursement.
Sometimes they even offer high-end shops - like a $75 restaurant shop.
They have an 800 number. Why don't you call and find out what's going on?
NOTE: I'm not on the forum every day. If someone comments on my post, I might not reply right away. I've been a shopper since 1991. I've never done any work for a MS company in any other capacity.