AEXtras exploit?

After doing the offers and surv3ys on AEXtras they then dissapear. Is there a way to get previous offers back and to repeat them? By downloading the iphone apps, theoretically i could get unlimited AC's by repeating these offers, if i i was able previous offers back.

One way I have found to be useful for downloading apps is to have two AExtra pages open to the same app but different offers. Open the first link and start downloading and while that is working, start the same for the other offer. It should accept both as completed if done correctly.