[SIM-2362662]

I have an iphone 4 jailbroken . How i can earn with it?

[Argyle]

You could install multiple GPT apps on your phone and use a UDID changer on each app you install.

Using the UDID changer will cause the app to think you are on a new device. The network, however may or may not payout because you would be using the same IP address. Try to get a Proxy and use it before connecting to the apps.

[SIM-2362662]

I saw a thread 2-3 days ago , but i can`t find it anymore...
If someone know what i`m talking about , please post it here.

[Shot Caller]

I think you might be talking about this -
https://hackforums.net/showthread.php?tid=4364564

[Argyle]

I saw a thread 2-3 days ago , but i can`t find it anymore...
If someone know what i`m talking about , please post it here.

Mostly all threads on monetizing a smart phone is to install a GPT app.

I just stated this method plus a extra tip since you are jailbroken.