You need to have a business whose doors can be beaten down by regulators in the event that you use your after-market mods as a tool to steal data or money from your customers.
To understand how this worked, cast your mind back to the Office Suite Wars of the early 2000s. Back then, Microsoft ruled the desktop world, controlling more that 95% of the PC OSes, a share so large and so ruthlessly acquired and maintained that they were convicted of violating anti-trust laws.
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