That's truly a good question - they could pull that data quickly and prorate people somehow. Maybe not for a bill already gone out, but perhaps going forward (even if they re-enable it).
I'm not going to knock them for this, given that we're talking about keeping critical infrastructure from being overrun while the remainder of the economy works distributed.
You should not knock Netflix at all. The request came from the European Commissioner for Internal Market and Services. Netflix helped out when they were asked to. If Europeans are upset about this decision they need to take it up with their elected officials not Netflix.
I'm not going to knock them for this, given that we're talking about keeping critical infrastructure from being overrun while the remainder of the economy works distributed.