[bediger4000]

For years, they requested files from my web site. I got single digit referrals from Yandex over those same years. So, I went to yandex.com and looked up some of the things my web site has info on (combinatory logic, for example). I got really spammy and scammy links from yandex on those subjects, and others that I've tried.

I just used my own judgement on it.

[omgtehlion]

Sometimes Google gives spammy links as ansewrs too. So why don’t block it altogether?

[bediger4000]

The key here is "sometimes" versus "all". In my estimation, Yandex gave nothing but spammy or scammy looking links, and certainly nothing worthwhile. So, I decided to futz with them.