Inbox Pays, at least for me, doesn’t seem to be worth the time. The cash out threshold is high at $50, and you have to do more than just read emails to get paid. You have to also complete offers. According to PTC Investigation (I site I generally trust for reviews of sites like Inbox Pays), you also have to talk to them on the phone in order to verify your account and get paid.
I’m the developer of an android app, called App Greedy, that gives you the opportunity to gain money by completing some easy tasks like playing games, watching videos, etc. After completing some of the tasks you can redeem your points through a PayPal account or a gift card. It’s also great for you to invite your friends as you gain 50% points from them every time they complete tasks!
Pinecone is one of the best survey panels out there for earning fast cash, and they pay quickly — usually by the next day — for the surveys you complete. The surveys don't come every week, but it's a nice little bonus when they do because of how fast they pay. Right now Pinecone is open, but there is no guarantee you'll get in just depending on what demographic they need right now.