While I can’t comment on the details of whether or not you have come upon a scam, I would expect any genuine new treatment to be accompanied by a full justification fit for the regulatory authorities, including scientifically convincing reports of trials and more fundamental researches acknowledged by experts in the field.

What I can offer on this is that clearing out viruses of the herpes family is specially difficult — relative to several other virus families, though perhaps this family of viruses may not be the most difficult of all.

Herpesviruses have evolved many features that enable them to escape or partly escape immune surveillance. They can go latent — for example the varicella zoster virus of chickenpox that can reactivate from latency many years later, to appear as shingles. Some herpesviruses even have devices to inhibit the display of their protein fragments at the cell surface, tending to evade the immune surveillance of cytotoxic T-cells, one of the important tools of the immune system for eliminating virus-infected cells.

So these viruses can be a very hard nut to crack, and for credibility I would personally expect to see something much more substantial than a herbal advertisement.