To put the "over there" remark in context, I grew up in a neighbourhing country.
[1] - https://www.f5.com/company/news/press-releases/f5-completes-...
Clandestine ops have an extremely low probability of success using this strategy and nobody who does them is this incompetent. Especially not Russia.
(yeah, i know there's a pro version of nginx. never used it)
So in that respect it isn't that impressive that he stayed in Russia even when (mostly non-state) news became more and more disturbing. Probably even less so if you assume a line of reasoning that nobody would bother with relatively small foreign company built around open-source product, a company that's already sold to larger foreign company (conveniently forgetting about the price that F5 paid for that company).
(edit: s/american-registered/foreign/: Nginx Inc. was registered in British Virgin Islands)