I know a board game shop owner that had this issue... He was specialized in a certain card game I won't name, and one of their employees had shares of the bigge

I know a board game shop owner that had this issue... He was specialized in a certain card game I won't name, and one of their employees had shares of the biggest shop in the country, and then by "coincidence" all shops that competed with that big shop, but weren't big enough to defend themselves, kept losing access to products, and kept being banned from hosting tournaments, because they violated some policy that there was no explanation, and the only way to get accepted back was convince the manufacturer of the game that they didn't violated the policy... whatever policy it was. It only stopped after a regular couldn't buy his favourite product, got pissed, and threatened to sue the manufacturer, that regular is a star lawyer so the manufacturer finally understood they faced a real threat now.