I am surprised they look at you like a moron. Myself and all my friends have fitbits. The reason we all have and use fitbits is because that is what we're all connected on. If one friend got a functionally better but cheaper watch off Amazon they wouldn't be able to join us in our group challenges and comparisons. This has actually happened a few times but after a while that person got what the group had.

That being said there are apps that bring this up a level and let you connect multiple products and devices. If one of these apps becomes popular then it's less dependent on what device you own.