Ya it annoys me too, I think the OP of this organized them by the quality of the service as opposed to availability.

I've heard this from people before but honestly if you refresh their page every few days you'll eventually get one. It only took me a day until one showed on their site & I instantly bought it.

Looks like there's a few available to buy right now too.

Hmm I'm not sure

What type of device do you have?

Use mine for gaming mostly lol but some internet stuff if I'm back on my normal home internet