I've only had a couple items come thru as rejected, but shipping is always reimbursed. And, I don't waste ANY time picking purchases out - just meet the guidelines & get it done. My rotating out of pocket hovers around $200. The money you make per task is pure profit + ship fees are reimbursed. Yes, there's gas + tape, printing, etc, which I'm not thrilled over. And, I know how much is owed me because I reconcile when Paypal hits.
Canada - Please don't call me a liar. I reconcile (as best I can) and there really have only been a few that were not paid. No one is being forced to work for that company. I don't begrudge anyone for wanting to do (legal) work for pay.