Seems to be related to their DNS then.
Nameserver trace for
www.lightspeedcash.com:
* Looking for who is responsible for root zone and followed j.root-servers.net.
* Looking for who is responsible for com and followed m.gtld-servers.net.
* Looking for who is responsible for lightspeedcash.com and followed ns2.national-net.com.
Nameservers for
www.lightspeedcash.com:
* ns1.national-net.com returned (NORECORDS)
* ns2.national-net.com returned (NORECORDS)