Comment by MallocVoidstar

Nitter currently relies on the mass generation of guest accounts, a weird anonymous form of account that was only supported by old versions of the Twitter app. Creation of them was totally disabled today, so every nitter instance will be dead in under 30 days (when they expire). Scrapers apparently also relied on this, as every public nitter instance was being hammered by scrapers earlier. Instances will probably shut down quite soon unless someone finds another way to create tens of thousands of accounts in an automated fashion for free.