As there is no leadership on top, this helps swamp to get control.
It looks to be just a maint or update. This is actually bad because subnet has to be up 24/7, even if 10 min down, it will push actual devs away. In future those interruptions should be less often and coordinated to fixed time.
Zforever97, on ICP, those 503 errors are usual thing during updates. I have not seen those few weeks now, so i think they appear less now.