It is a smart move. When Plus first came out, I signed up and loved it. Then they released the API and I realized I could save a bunch of money by canceling my monthly sub and just use API. Then they released a bunch of cool features that are only available with Plus on the web or app, so I'm off the API and back the GUI.
I did the same but with GPT which is 10x the price of 3.5 the API is no longer cheaper. I'm sad because I hate using the website. Every couple of days it silently logs me out so I have to retype my query and it's also just a really poor UI
When I was on plus the only feature I used was the bing thing but they pulled it so I stopped paying. Also it was basically useless because it's so slow and can only handle 1 browsing thread at a time.
Maybe it's just my Firefox antitracking blockings but most of times when I go to chat.openai and it redirects to login page, I can just retry going to chat.openai and I will be logged in. I haven't had to relog in a month at least.