Why a new store gets banned on the first login

It is rarely one thing. Platforms score the whole session: address, device, payment, timing. Here is where a fresh account usually fails.

The address has a historyA clean-looking residential IP can have years of abuse, dozens of accounts or a recent datacenter history. You cannot see that from the vendor page.
The device is consistent — with the wrong identityTimezone, language, fonts, canvas and WebGL should match the IP country. A perfect device with a mismatched address is a flag.
Payment is reusedThe same card, bank account or billing name across stores links them together, whatever the IP says.
Behaviour is too fastCreating the account, listing products and taking the first order within minutes looks automated.
The pool is sharedIf dozens of sellers use the same addresses, the history follows the IP, not the seller.

Checker Pricing

Tips

Test with one account before scaling to ten; the cost of a test is one account.
Write down the exact sequence (IP, device, payment) for every store — this is how you find the variable that fails.
Do not buy aged accounts with unknown history; you inherit it.

Will a new IP fix a banned store?

Sometimes, but if the device or payment is the signal, a new IP changes nothing.

How long before I know if an account is safe?

First orders and the first payout are the real tests, not the signup.

Is a residential IP required at all?

For seller accounts it is the safer default. It is a signal, not a guarantee.