1. Pebble supported 3rd party watch faces based on a file. There was a great little site that let you use a visual UI to build the file and, if done from your phone, upload it right to the watch. Once, when out at midnight beer launch, I made a custom face for the beer and won a little keychain from the brewery. My Apple watch could never.
2. Once time in 2014, I ran into some Pebble engineers at an ice cream shop in Palo Alto, they spotted my watch, they bought my scoop! Fun, weird little Silicon Valley moment.