Purse.io makes you wait until the person gets the item that they bought delivered to their house before you get paid, so that's something that I can't wait for because
1: Let's say purse.io pays me in 3-4 days (that's if I'm lucky), then I'd have one day to buy the thing.
2: The place I would buy it from wouldn't deliver it within hours, so I'd still have to wait for that as well.
Even here no one will pay you until the product gets delivered, even if you find someone here, the money will be held in an escrow until they receive the product. If you don't want to wait, you're going to have to find another way of getting the BTC.