alt Hacker NewsI am 67.87% certain they make it dumber/smarter during the day. I think it gets faster/better during non-business hours. This needs to be tested more to confirmed, though. However, they have exactly ZERO transparency (especially the subscription model) into how much you are consuming and what you are consuming. So it doesn't really help with the suspicions.
I remember reading an article about different behavior between summer and winter. So, working better/worst in business hours doesn't sound completely crazy.
But they turning some knobs based on load also looks razonable.