A total of 22 subpoenas have been issued to online retailer by the New York State Attorney General's office over how sites share credit card details with other firms.
New York Attorney General Andrew Cuomo says the investigation found that when consumers shop online from familiar retailers, they are often presented with a discount or cash-back incentive offer as they complete their purchase.
When consumers then click on the discount or incentive banner, they are "unknowingly directed" to a membership program seller's Web page that is separate from the online retailer's site.
GameStop vice president Chris Olivera told Kotaku that the company will cooperate fully, “I can confirm that we were subpoenaed. We are still reviewing the matter but do intend to work fully with the New York AG's office. Beyond that, I would not be able to provide any additional comment."
You can read the full release from the Attorney General's Office here.