It seems like they are targeting smaller sites desperate for traffic.
They are trying to make the owners monitoring (Google) analytics look at their own site offering "SEO", "marketing", "social optimizations" and similar services that are probably as shady as their way of "contacting" the owners of low-traffic sites.
I have a site with less than 200 "visits" per month.
20% of traffic apparently comes from the site semalt.semalt.com.
10% comes from this site: buttons-for-website.com.
Another 6% is from this one: make-money-online.7makemoneyonline.com
I have a site with less than 200 "visits" per month. 20% of traffic apparently comes from the site semalt.semalt.com. 10% comes from this site: buttons-for-website.com. Another 6% is from this one: make-money-online.7makemoneyonline.com