This sounds all too familiar.

It's not just the mass/indiscriminate emailing, implication of permission from official sources, but also the domain name that adds to the sketchiness.

What kind of name is "BestWebLayout" for a legit web services company? It's like Girigory literally just mashed keywords into Google's Keyword Planner and grabbed the first one available in .com.

I suspect he may have relatively benign intentions to start, and just wanted to build up his credibility by having a bunch of established plugins listed on his WordPress.org profile page.

This isn't the way of going about doing it, and ironically damaged his reputation far more than he would've gained by getting access to a few plugins.