I don't have anything to back this up, but it's probably due to the influx of users opening Binance due to the recent price pump(bitcoin breaking above $20,000 like 20 minutes ago).
I'm not a Binance customer anymore and haven't visited their site in a long time, but I'm guessing that's exactly what's happening. People are either signing up in droves to buy bitcoin (since Binance is one of the only ways to do that easily for the average person) or are trading/selling more than usual. Given their stellar reputation, it isn't likely it's anything more than that--and I don't think it's anything to be worried about, as in them scamming you or that they got hacked or something.
I woke up this morning after a long sleep only to find that bitcoin had shot past $20k, which sort of surprised me. That in itself will probably lead to a lot of things, delays on exchanges being just one of them. There will probably be more traffic to the forum, more idiots selling their houses to buy bitcoin, you name it--at least until the price drops (but I'm hoping that doesn't happen right away).
