Dropping a service, which is typically open to the public, to a competitor solely because they're a competitor is considered anti-competitive. It's one of the

Dropping a service, which is typically open to the public, to a competitor solely because they're a competitor is considered anti-competitive. It's one of the reasons Amazon won't admit to dropping AppleTV and Chromecast from their entire store because the products compete with their Firestick. Instead Amazon says that users are confused when trying to buy their firestick, so they're blocking even the third party sellers from listing it. Note that Amazon allows thousands of competing goods to sell in their store that users can equally get confused about. Facebook kind of screwed up here, since the EU/UK does not require a company to be market-dominant to be eligible for anti-competitive fines.