And a huge thanks to everyone who supported me...
- with advice (I completely forgot that I can send private messages here)
- with logical questions to the opponent
Fortunately, it turned out (as I had assumed, in general) that they were not scammers, but simply a startup that had not yet managed to establish normal interaction with users.
KINDNESS!? WHAT KINDNESS???
Will I receive an apology for the unfounded accusations?