By that I mean applications and inapp purchases? For apps download a tweak on cydia called installous. For inapp Purchases download something called iap cracker. The bad thing about iap cracker is that you can not do it for all apps and you can't buy on stuff it does not work with.
Yes
YES, "jailbreaking" or ANY type of modifying the device does VOID ALL warranties from apple. [But in my opinion: I don't give a flying f*** for warranties]
Color can affect your purchases by the color you like.For example, if you love the color blue, red , or purple, you may want to buy the only things that are blue , red, and/or purple.So that's how color can affect your purchases.
No... not at all. It only applies to a jailbroken device.
Yes. Jailbreaking will not affect any of the default functionality of the iOS software.
it doubled
Increases purchases from producers
Rooting an Android device will provide more benefits such as superuser privileges which can be used to get free apps or inApp purchases or can be used to do things like remote into a computer or take screen recordings of your device. Whether or not you believe it is good is a matter of opinion but depending on your actual android device it will have its advantages and disadvantages.
Yes. Jailbreaking will not affect any of the default functionality of the iOS software.
obviously, as you cannot get them w/o jailbreaking
Yes, jailbreaking does void the warranty.