I swear Gigspot must spend big $$$ on priority status on search engines. Gigspot is ripping you off and blocking your access to the full list of jobs on the companies that use the Shopmetrics platform. Write down the names of the companies that you're doing Gigspot shops for, get out of Gigspot, and sign up for the companies directly. Then you'll have access to ALL of the available shops, and get the full amount of money offered for the shops.
Shopmetrics, Sassie, and Profet are platform software used by a lot of different MSCs.
ISS is a website that hosts shops from companies that no longer have websites to host their shops, or they use it as an additional platform, like Intouch Insight.
Presto does something similar for companies that use the Sassie platform. They host prepaid "insta-shops" that get paid very quickly, must faster than most MSCs on their software, and they list Sassie shops hosted on the MSC's websites on the orange pins. The orange pins will take you to the MSC website so that you can sign up for the jobs there, and get paid in the MSC's regular schedule, which is something quite a long time.
Marketforce, Secret Shopper and a few others have their own software that is neither Shopmetrics or Sassie.
If you need a list of the MSCs, there is a list at the bottom of each page on this forum.