Yeahhhh I wonder if this is a new shell company spun up to either take on the old one as a way to restructure financially and get rid of some debt (I have no idea how this would work) or to give them enough time to wind down. Or something else? Who knows but definitely weird.
The extra annoying part is that learning each auth is basically a single-use exercise. Sure, you get better from 0-5 but from 5-100 it's mostly just grumbling and then trying to forget whatever esoteric "standard" was implemented.
Source- done over 300 system connections. Save the straight API keys, they're all special and unique snowflakes.