[Usbflasher]

but even if its not linked with other accounts by that i mean new addy everything new so how they connect it?

There Is an association/link with other accounts, hence every Identifiable detail (device Included) must be changed.

device too?

Called device fingerprint. Even with a new device, address, IP, and so on they can still link you or just ban you for fraud pattern. Machine learning will get everyone.