When we talk about gatekeeping, what we mean is that there is a company or a set of companies that may be operating as an oligopoly and that has a dominant position in the market. They're able to exercise that dominant market power to the detriment of other stakeholders, whether that be consumers, workers or third party suppliers and small businesses.
It's not a bad thing to be big. It's not a bad thing to be a large firm. What we are saying is problematic is when you have these very large firms that then take advantage of their market position and impose terms, conditions, contract terms, tolls, etc., on markets such that, again, they're sort of acting as these de facto private regulators on markets, whether that be charging high commission fees, like the Apple and Google app stores—in the U.S. there was a big movement for the app developers to lower the commission fees—or whether that be restricting things like the right to repair at third party repair shops. All of these are different ways that terms and conditions are radically being affected because of the dominant power of the gatekeepers.