Their 5 hour limit works better with a "constant background trickle" usage pattern. I don't think the $20 account is a good fit for hobbyists-who-have-day-jobs (which is where I think it should be targeted). They should have an offering that meets "binge" needs.
Once this change comes into effect and I'm not able to use the chat side of things for more casual inquiries and ideation it'll be the motivation I need to try out Claude or Grok again. I'd rather have a second subscription with a different provider than double up on one for more of the same.
At OpenAI/Anthropic scale, they're can't just scaling up-and-down on demand on rented autoscale GPUs (to be honest; that's not really practical anymore for even medium size volume); the peak hours are basically the same for everyone.