This is a new month. You may have done those shops near the end of March, when fees were higher because they were trying to get the last shops done by the end of the month. Now this is a new month, they've got another 23 days to get the shops done, so they offer them for less. If nobody takes the shop, the price may go up in a week or two.
This is a pure marketplace here. We are the sellers -- we sell our time for what it's worth to us. The MSCs are the buyers -- they want our time for the least they can get it for. When our needs and their needs intersect, a shop gets done. If your needs aren't intersecting with their offer, either ask for more money or do something else with your time this week.
Time to build a bigger bridge.