Why is semalt.com in adsense

I have no idea who this company is but they keep coming up in my adsense account here is all the information.

over all don't trusted it!!
After researching all over google, yahoo and bing I find several reports asking:

things like:

> Does anyone know who is semalt.com
> Is this a hack or a threat ?
> will it effect my Adsense ratings ?
> Very suspicious site who is this?

after looking at the site it looks like it wants you to sign in here is the who is info below. I think they are doing it to get you to go to their site and start looking for them is like a reverse marketing scheme.

WHOIS information for semalt.com:***

[Querying whois.verisign-grs.com]
[Redirected to whois.name.com]
[Querying whois.name.com]
[whois.name.com]
Domain Name: SEMALT.COM 
Registrar WHOIS Server: whois.name.com 
Registrar URL: http://www.name.com 
Updated Date: 2014-01-02T23:11:08-07:00 
Creation Date: 2013-09-04T13:31:56-06:00 
Registrar Registration Expiration Date: 2019-09-04T13:31:56-06:00

Registrar: Name.com, Inc. 
Registrar IANA ID: 625 
Registrar Abuse Contact Email: abuse@name.com 
Registrar Abuse Contact Phone: +1.17202492374 
Resellser:  
Domain Status: clientTransferProhibited 
Registrant Name: Whois Agent 
Registrant Organization: Whois Privacy Protection Service, Inc. 
Registrant Street: PO Box 639  
Registrant City: Kirkland 
Registrant State/Province: WA 
Registrant Postal Code: 98083 
Registrant Country: US 
Registrant Phone: +1.4252740657 
Registrant Fax: +1.4259744730 
Registrant Email: semalt.com@protecteddomainservices.com 
Admin Name: Whois Agent 
Admin Organization: Whois Privacy Protection Service, Inc. 
Admin Street: PO Box 639  
Admin City: Kirkland 
Admin State/Province: WA 
Admin Postal Code: 98083 
Admin Country: US 
Admin Phone: +1.4252740657 
Admin Fax: +1.4259744730 
Admin Email: semalt.com@protecteddomainservices.com 
Tech Name: Whois Agent 
Tech Organization: Whois Privacy Protection Service, Inc. 
Tech Street: PO Box 639  
Tech City: Kirkland 
Tech State/Province: WA 
Tech Postal Code: 98083 
Tech Country: US 
Tech Phone: +1.4252740657 
Tech Fax: +1.4259744730 
Tech Email: semalt.com@protecteddomainservices.com 
Name Server: ns1jlp.name.com 
Name Server: ns2nsw.name.com 
Name Server: ns3fqs.name.com 
Name Server: ns4fmx.name.com 
DNSSEC: NotApplicable 
URL of the ICANN WHOIS Data Problem Reporting System: http://wdprs.internic.net/