I don't see how this is much more secure than a reusable one-time pad. Which is not so secure. In fact I'm a little weary of GRC since almost all of his posts

I don't see how this is much more secure than a reusable one-time pad. Which is not so secure. In fact I'm a little weary of GRC since almost all of his posts have so many extreme claims such as "This “Off The Grid” technology is the only known system to provide secure encryption using nothing but a specially designed piece of paper.", "create your own personal custom grid (which NO ONE ELSE will ever have)". All of this makes it look like a scam to me.