Songza started out as a pretty crappy looking website that had nothing more than, from what I recall, “radio stations” that simply strung YouTube embeds together one after the other by genre or artist. Maybe there was also a 728x90 and a 300x250 ad on the page (and their logo of course)… but literally nothing else.
I believe the website was acquired by the team who created AimeeStreet (which sold to Amazon); they operated it for a couple years and then basically threw the whole thing (except the name) out the window and started over.
After trial and error, they created a brand and service that people liked and ultimately just sold the app to Google. Big pivot… check out on WSJ.