Apologies for this being off-topic, but you revealed a delightful SN feature (Easter egg?) to me with this. Probably unintentionally:

So anyway, I DM’d Andy Yen (@andyyen) on Twitter

SN's way of telling us that Andy is not here on SN (yet).

Anyway, haven't looked at Protonmail for quite some time, but perhaps time to reaccess, thanks!