Kise,
Ipsos used to guarantee that you would get paid for any shop you did within 3 weeks. But that doesn't hold water anymore. What is observable, is that if your shop, ANY shop, is edited and approved before the end of the day on Friday, you will be paid for it on Tuesday (sometimes Monday), except the two to three times of the year when they blame PayPal for not getting their payments out, then we get to wait, usually about a week, to get our payments. That applies to ALL shops, Sassie and Shopmetrics.
Presto is NOT Ipsos, but Ipsos does have insta-shops on Presto. On Presto they say that you will be paid 5 - 7 days after you complete your shop. But on the gas station shops they put in a disclaimer, you'll see it when you try to sign up for one of them, it says there may be a 5 - 10 day delay before it gets edited and approved.
For a long time I thought that Ipsos owned Presto, but the folks on the forum say that isn't true. Ipsos is, by far, the biggest user of Presto's Insta-shop program.