GPT’d it:

There was a significant change in Apple's App Store policies that occurred in response to regulatory pressure and lawsuits, most notably from Epic Games. As part of this change, Apple announced that "reader" apps would be able to provide a single link to a website for account management, including payment setup.

"Reader" apps are a category of apps defined by Apple that provide previously purchased content or subscriptions for digital magazines, newspapers, books, audio, music, and video. Examples include Netflix, Spotify, and Kindle. Before this change, Apple's policy was to disallow any links or instructions that explained to users how to pay for their subscriptions outside the app, which allowed Apple to enforce its 15-30% commission on in-app purchases.

The situation between Apple and Basecamp originated with the launch of Basecamp's new email service, "HEY". Basecamp didn't want to use Apple's in-app purchasing system (which would require them to give Apple a significant cut of the subscription fee), but Apple initially rejected updates to the HEY app because it did not offer in-app purchases.

Apple's revised policy could potentially benefit companies like Basecamp by allowing them to link their users to an external website for payment setup, thereby bypassing the App Store's commission. However, the exact specifics of the interaction between Basecamp and Apple post-2021, and whether further disputes arose, would require up-to-date information beyond my current training data.

For the latest information on this topic, I recommend checking the most recent news sources or official statements from the companies involved.