I have completed 62 assignments for Intelli-shop over a 13+ year period. As has been stated, some of their shops offer, what I consider, good pay, while others, fee wise, do not appeal to me. To date this year, I have been paid for my six jobs and have never read of any complaint dealing with not receiving one's money. They are a business, while shoppers are contractors, therefore, they expect competence.
The six above shops were all for the same client and entailed a $25 meal with an average fee of $11,66. In addition, as I am a veteran, the eatery extended me the courtesy of a 15% discount, increasing my spendable dollars to $28.75. My pay arrived by the 20th of the following month. Finally, I have never needed to chase my money.
OP, pick a single shop and see for yourself.