To answer the question in the title with a wiki quote:
Electronic spamming is the use of electronic messaging systems to send unsolicited messages
So, yes, that is spam.
Let's have a closer look:
- You get unsolicited email
- The site owners are protected by a whois proxy
- It seems fishy to you
- Such a service is available already from a known company for free
The first one is a no-brainer, that's the (a) definition of spam. The others are indicators to just walk away and go with the non-fishy alternative.
On the other hand, the IP the domain resolves to (220.127.116.11) is clean for most blacklists and hosted in Germany, where regulations on websites are rather strict.
Yet, the HTML that is delivered to
curl of their main page does not comply to those strict laws. That may be another clue to just leave it alone, and maybe tip their hoster about it.