I used to take substantial (up to 60mg in a ten hour period) and well-tolerated (very little sleepiness, no euphoria) doses of valium when flying. While I never took it when not flying, I had (and to some degree still have) an intrusive desire to be taking it, especially after recent usage.
I took it to fly for maybe 4 years, with an increasing dosage (I started at 2mg), and flew about once every 2-3 months, and had a couple of noticeable comedown periods. I don't know if that fits your "addicted to valium" definition, but I didn't have any noticeable "more awake" feelings in the 2-3 month dry periods.
(I recently switched to beta-blockers, which are neither addictive nor habit-forming, for flying, with a greatly decreased valium dose, and it's going great. Would highly recommend trying it for anyone uncomfortable with the direction their benzo tolerance is travelling, and with appropriate symptoms)
That looks really simple and all, but isn't the concept with Stripe a litte unsecure? I really prefer to to use a third-party solution when I use my credit card online. Using this method I can't know for sure that the developer isn't saving my credit card info.
Wouldn't it be better to use Paypal or some well known third party for something as important as payment?
[1]: https://code.visualstudio.com/updates/v1_11#_text-search-imp...