Heh Heh!
Yes, Siki to the Max is written using one Gurbani Web Thick only, and is not readable unless a person downloads the font to his/her fontbook.
Aman is the genius for enhancing SEO, and could help Rozanna with that too.
SPN supports a lot of fonts. Problems can pop up for individual members when a font is not in their fontbook and the browser he/she is using is unhappy with particular fonts on particular pages. That is on the reader's side, not SPN.
I am pretty certain that SPN supports Gurbani Web Thick; but right now I cannot see the link where you go to download fonts. Most of my fonts I did get from SPN.