According to market sources, GameStop CEO Ryan Cohen has been banned from eBay for promoting the company's $56 billion takeover bid. Cohen had reportedly listed collectibles related to the acquisition proposal on eBay, with some bids reaching thousands of dollars. GameStop had previously made an uninvited takeover offer to eBay, and despite its market capitalization being significantly lower than eBay's, the plan has raised concerns among investors and analysts about its financing capabilities and high debt risk. eBay's board of directors is expected to review the proposal this week, and the market is watching closely to see if Cohen will escalate his acquisition efforts further.