I wouldn't if it was just one $3 job, or I might if I'm at the location anyway for another reason but these jobs were all in close proximity to each other, only took seconds to do and I got paid the same day. I did the 17 convenient stores in a little over an hour and had $51 in my PayPal account by 10 p.m. that night. It was totally worth it to me.
The Field Agent jobs are extremely simple, not like a regular mystery shop, although occasionally they will post a MS. The jobs also will go up in pay if not done in a certain amount of days but it is a gamble when you wait. Some may have a fee increase or they may be taken off the board completely. They only need a certain number of the jobs completed for each client. They post every location available but once the quota is met, all remaining jobs are gone. When you accept a job, you have only 2 hours to complete it. I have a PayPal debit card so I have instant access to my funds. Even a extra 5 or 7 dollars in my pocket within 24 hours, most times sooner, for a easy, quick job is worth it to me. You won't get rich off of Field Agent but I like the extra spending money.