When I first started MS last July, I took any job that I could get. I started shopping to supplement our family income. My husband wasn't working the seasonal overtime we were used to in the construction business and needed to pay our mortgage and $170/week daycare bill.
I've done most of my MS with Corporate Research. I liked them because they paid by direct deposit and about every two weeks. Their shops usually start at $4 or $5. I did hold off accepting some once I realized the commission would get much higher, but then when I would go to accept them knowing when the commission was getting to a point worth my while, someone else would have already taken them. So, I'm out that extra income I had been getting because I waited TOO long.
Everyone has their own reasons for MS, mainly as extra income for their budget from what I've seen, in whatever their life style or needs are. I've seen posting where people do it for fun and the extra food or money is a bonus. If people take these jobs at lower commission, it may be they are in a situation they NEED the money, and maybe, being new, they aren't aware the shop fee increase. Whatever the reason, hopefully these posting will inform everyone the fees can increase if they wait it out a little to make it more worth their time.