I've done this for about 2 months and the best advice I can give you is to be patient and make sure you do the shops that assigned to you. Request as many as you can and don't shy away from the low dollar shops. They add up. Prism seems to pay quickly. ARC is picky about the reports, but the coordinator has offered suggestions to refine my reports. I've also had a good experience with 360 Relay

Michael H. from ARC is fantastic. I asked for feedback on my reports and he was happy to give it.

Be patient. Sometimes it's takes a lot of requests before you get assigned a shop.