Help Understanding the New Restrictions and Limits

I’ve been playing with Codex for the past 2 months, pretty much unrestricted. Never hit a limit, never asked to upgrade, just unrestricted access to both ChatGPT and Codex functions. As of August 25 I saw the news and was impacted by the 5 hour limit. I’m pretty far down the path of building a pretty cool app and now the restrictions are getting frustrating and over the top. How can a company go from complete unrestricted access to the opposite? Is this the new reality? Just trying to get a handle on how best to proceed. This could get very expensive.