Something I noticed about offers

On some earlier threads I noticed some people said offers are expiring. I'm not sure they are.

What I mean is I have clicked on offers I wanted to work on, and at times I would get re-directed to another site. I thought maybe this offer is expired, but then I would re-clear my cookies and check on the offer again and it pops up ok and I'm able to work on them without trouble.

Has anyone else noticed this?

Good advice! If you have completed the offer elsewhere also will cause some of them to re-direct. Some networks know if you have already completed an offer elsewhere.