They dont have such capability in billing.GeorgeN wroteSo it seems like they do it to everyone and temporarily speed things up for those who point it out and complain and want to swap ISP.
But they might upgrade bandwidth plan (unlikely).
What is happening lately:
1)ISP hitting CDN backbone limit, CDN automatically shutdown due latency, things get even worse.
2)There is bandwidth limits enabled approx 5 and 6pm, speed is reduced comparing with day time.
3)If backbone utilization becoming high, top downloading users (24h span) get throttled.
There was bandwidth limits adjustments for last several days to improve situation. It is still ongoing.