Okay, so I got my 2nd hand ipod touch 1g 16GB Ipod Touch today, i bought it off Ebay, jailbroken, and it has Cydia and Installous. I decided to check Cydia out, and they have about 180 apps on there (i think they are real off of the App Store anyway). So i've looked around, and i've checkd out Installous, which happens to have MANY more NEW apps. Okay, s i've purchase about 3, only to find out they're not working.
So, when i go to purchase an app, i get to choose between a few sites to downlosd the app from. After it's purchase, it wont open? If i double click it, it comes up with Install, Delete or something else.
Also: Do you have to pay for the apps off of Installous? At the bottom of the App Info, it says the price. :?

You're trying to run them from Installous. You need to select the app you purchase then tap install. Let the bar fill then go to the home screen, and find the app.