O&O are a well known company and the subject software is theirs click here
Your link goes back to a research/review/sales site click here which again is popular but mainly across the herring pond.
I would think it is simply a case of spam (slightly higher class than most!!) which we all suffer from. I do get mail from O&O but have not had their products offered by a third party as yet.
If he uses decent firewall, AV and anti-malware I doubt he will have a problem with the likes of this.