Allowing users to take advantage of their monthly/weekly/daily token limits with the software of their choosing is a perfectly valid expectation.
Restricting it to their own underperforming, buggy TUI client is textbook walled garden.
Because that's what the API is for.
This isn't hard to understand. The cost you pay for subsidized tokens is lock-in. If you don't want lock-in, there's the API.
This isn't egregious or wrong or anything. It's exactly what you'd expect out of a heavily subsidized product option.
Really walled garden is the only direction that makes sense--models will slowly become commodities