Sudden ranking drops! Whats this?

I had bad anchor profile from the past with several hundred 2.0 spam but its ridiculous to start acting just now after 3-4 months
Anyway its kinda sad to lose 700e monthly revenue just like that. Starting from 0 will surely take 1-2 months to get my ranking backs.

I will try to avoid .ru backlinks for now and do some more tests since i am still inexperienced in the seo field. Stepped in too many mines this time.

Aw man, that sucks apeballs. I'd try a reconsideration request like someone else said, its worth a shot and you won't lose anything.

SAPE is too risky, you have to be really careful and never try it on a site you really care about

It does sadly look like a slap. Check WMT for any messages.