I'm embarrassed to say that I forgot** that the ad they mailed me contained the password for the webpage, so IIUC that means even if google comes up with the webpage, it wlll still require a password, which no one else will have. I suppose that makes it safe for me.
I apologize, and I hope you all don't feel I wasted too much of your time.
**I only used the password once, then kept looking back at the page for 3 days. I don't think I would have forgotten about the password 10 years ago.