ISTR "Lead Crystal" is a Trademark name, not sure about "SiO2" but they are the same battery "type". The blurbs say they are different from regular AGMs in the way they describe and that is why they are different from AGMs in how they act.
I don't think it is all a scam. what would be the point of that unless it helped "Sales" bring in more buyers? There is no sales campaign that I can spot (which was pointed out) Maybe they have enough domestic consumption that they don't need to export them. Don't know, not my problem.
If you want to see a sales campaign in action to convince everyone they can't live without this new thing remember The Music Man show. Hmmm reminds me of something. :)