I'm still skeptical about the Cydia Store. I won't spent money on apps that might stop working with any update Apple may release. At least with the App Store I'

I'm still skeptical about the Cydia Store. I won't spent money on apps that might stop working with any update Apple may release. At least with the App Store I'm reasonably certain my applications will work on a future iPhone. Also, 3G Unrestrictor has sold 10,000 times for $2 in the Cydia Store when you can get the VoipOver3G app for free? I also don't get why anyone would rather by something from the Cydia store (iWipe) than the App Store (iEraser). My guess would be the last one suffers from bad reviews.