I would give 5 stars based on my experience as only a buyer not a seller, except that there are no loyalty incentives. I shop there often and yet there are no discounts or coupons offered. I'm definitely not the type to try to get referrals. I'm not a Thredup sales associate, just a customer.:)
The clothes I have gotten were mostly very good quality, One dress I got that say's it is 100% silk, feels like sandpaper? I think it should have been listed as flawed in that case. I will likely shop there again if they ever give me a coupon, haha!