Recently, they have been starting most of their projects at lower pay than in the past. However, they will add a fee and increase the fee as necessary to get the shop done.
For example, they started the insect related wireless company compliance reviews quite a bit lower than in the past. However, they are all at 25 to 45 dollars now. If they were able to get a bunch of them done for the low starting pay, then more power to them. If people are willing to work for less than minimum wage, then they have every right to take advantage of that.
If somebody in your area takes it for no pay and wants to work for a sandwich, then they made a great business decision. They are in business to make money, and if someone's willing to work for free, then they have every right to contract with that person.
However, if nobody in your area is willing to work for a sandwich, they will begin to add some pay. If it's something that you're interested in, keep an eye on it. I've seen those shops get as high as $30 when they get close to the deadline.
They are testing exactly how low they can go and still get acceptable quality work done. All companies will continue to test the lower limits of what shoppers are willing to accept for compensation. If those shops get done, then it just means that people are desperate, bored, or financially illiterate.