So, Field Agent-- I've had it twice on two devices. After a did a few of their assignments, no more new assignments would show up. It's as if they deactivate you after you successfully do so many assignments with them. Some states, it's apparently not allowed because the payments? Not sure but if you go into the app store, read the comments! Now, Gig walk, I love! I don't do merchandising assignments through it-- too much risk of putting in hours of work for a merchandisers clip strips and then what happens if you mess up one thing? But I get great mini assignments from it all the time and they're super easy. I always grab up stock product checks in/out of stock and things like that. It's pretty nifty and sometimes when I'm traveling, I'll see little Gigs nearby that are super easy. I did one for vitamins once that was easy peasy. I've also done Energems ones. Anyway--yes, good luck with both, except Field Agent deactivated after a while.
That being said, do you use Ibotta? If you get paypal payments, use that app on grocery shops to get back a little extra

Plus Checkout 51 is another money app. I frequently use these. Oh, and Shopkicks! you can get kicks for scanning and walking into stores. You won't pay much attention to it until suddenly you have enough for a $20 walmart gift card