The whole sentence reads You're Jet Insider No. 100,000 (or whatever your number is). The number probably loads from a separate service, there is a noticeable delay before it renders.
There is a number that comes after "No." which shows your spot in line. It took a few seconds after the page was rendered to show up. Also, that entire circle is in flash. That may explain why you had that kind of experience
There's no flash on there except for some thing for copying the referral URI to the clipboard.
Re:Amazon vs. Jet.com
by libraryatnight on Friday January 09, 2015 @12:37AM
(#8860923)
There was a delay before it served me my number, so I saw the same for a bit. I was rather confused myself.
Thanks!
You're Jet Insider
No."
I could not figure out what the hell that was supposed to mean.
I guess this is just some launch last minute scrambling or something? Might not have been the best choice, anyone outside the US or wherever is being blocked has the first impression "Ah, they are going to take on Amazon and can't get a signup flow to work ... right".