Yeah, somewhere along beginning of this week, I noticed that for one of my domains backlinks count in google webmaster tools went from around 130 to almost 400. That's about 200% increase in somewhat around week's worth time. And not the total backlinks - that's way over 100k, but unique domains After initial shock, I took a look at the domains, and found partial explanation for that, some are related to SEO activities, but that would be no more than 50 domains. As it's rather strong niche, with 2.3 mil broad and 400k exact, I'm now not entirely sure should I be happy or wtf? Personally, I've never seen such thing before. Any thoughts? Similar experiences?