https://hey.com/apple/
They're criticizing them on anti-trust and monopoly grounds. Anti-trust laws were created through political means. Their enforcement was subsequently weakened through political means. They're saying not just that "hey, Apple is bad for making this business decision" but that "the government should do something about it that it isn't doing by current practice of enforcement of current law".
> That confusion is compounded by the fact that, for a small company, Basecamp has taken an outsized number of political stances — all of which employees are encouraged to discuss. Most prominently, the company and its founders have been vocal critics of Apple’s 30 percent tax on in-app purchases.
The author seems to be using a weird definition of "political". That's a business decision by Apple, which isn't a political party.