Originally yes, everyone's usage limit went back to 100% at the same time regardless of if you were at 0% or 99%. Now they tend to give out "banked" resets where users can choose when to use it for up to a month (except the most recent one, which I think was non-banked)
They realized the banked resets were too expensive, so they stopped giving those out for the last 2 resets.
Are they more expensive? I think it's a clever tactic that avoids sudden increased workload, because users may "save" their resets when they need some additional work done.
Over the last 2 weeks, 6 of the resets are direct to the usage limit.
In the same timeframe, 2 additional resets were banked.