Usage meter has always been completely opaque anyway. They could (and probably did) shrink the limit whenever they like.
The fuzziness is intentional. It gives them wiggle room and obscures how much "value" you actually get from $200, a 5-hour block, or a week. That keeps the tension manageable between subscription pricing and pay-per-token API pricing, especially for larger businesses on enterprise plans who want transparent $-per-MTok rates.
If they were fully transparent, like "your $200 sub gets you up to $2,000 of equivalent API usage," it would be a constant fight. People would track pennies and scream any time 5-hour blocks got throttled during peak hours. Businesses would push harder for pay-per-token discounts seeing that juicy $200 sub value.