I haven't shopped with them much, but have been paid on time. The last shop I did for them was in September, was paid by check, dated 27 days after the shop and received by me 40 days after the shop.
"Checks are cut the last week of each month. These checks will include all completed shops finalized between the 1st . last day of the previous month. (i.e. If you completed a shop anytime in the month of January you will be paid the week of February 25th, etc.). Payments may be subject to delay during holiday weeks. All payments are mailed via United States Postal Service. Your Sassie log will reflect if your payment is pending or paid. On the date your check is mailed, your sassie log will be updated to reflect a PAID with the corresponding date. You should expect your payment within 3-7 business days from the date paid. Your check will include your shop fee + any reimbursements if applicable on one check."