Various Stack Exchange sites seem to be getting one spam per hour for this organization, with a break for a good night's sleep:
The search results presently start yesterday at 06:50 UTC and continue with roughly one per hour until 10:58 UTC, then start again this morning at 05:00 UTC on a similar schedule. (This corresponds to 12:20 through 16:28, starting again at 10:30, Delhi time, which is the location of the service they are advertising.)
The IP address has reverse DNS indicating it belongs to webhostbox.net, and DNS is also handled by this provider. The whois registration appears to reveal the registrant's real name and contact information. The netblock (and the webhostbox.net domain name?) belong to publicdomainregistry.com, apparently an operation in India.
I am collecting this documentation here to hopefully help coordinate contacts with this provider. I will be sending them an email shortly.
To nominally turn this into a question, what more could we do to dissuade them from spamming us?