Night Rider

As Jim Carrey put it in Jim & Andy: "What do THEY want?"

Is it a core feature for my business?

If yes, build.
If no, buy.

After a few years of continuous use, Spotify's daily mixes are on point beyond belief. Always just the perfect music for me.

ngrok

If infoproducts count, then I'm level 3. If not, then I'm level 0.

Also HackerNews as an example of "Don't look good but gets the job done and is among the most popular sites online"

Stripe

We do it via text at Startup. Has been working great for the past 2 or 3 years. Nobody has complained yet about not having to remember yet another username and password.

yes