Wish's Registration Policy states that stores registered after October 1, 2018, may be subject to a $2,000 store registration fee. This fee may apply to sellers with China as their only fulfillment location.
Since all Printful products ship out from the USA or EU, the $2k fee won't apply to stores fulfilling products exclusively through us.
If, by any chance, Wish flags your store and requires the payment, please contact support@printful.com and we'll help you resolve the issue!