I did a shop for $25 two weeks ago. On Wednesday, I am doing similar shop for the same MSC but for a different branch in Toronto at $70 in fees. It does not have any bonus. I have ignored this shop because it was at $15 several weeks ago, but of course at different location.
Overall, I did find some shop fees go lower in Toronto. Very few went up but according to the emails sent to me, the fees did go down. I am staying away from them. It's possible that they had a lot of takers at the previous price, so they lowered them. As a matter of fact, I observed that they had even removed the reimbursement. It really depends on what shops shoppers are interested in or are offered.
I have been receiving emails on shops outside of Toronto but around Ontario and they are really at much higher rate. So, supply and demand really plays on it. I don't know about the US rates.