The population who ditches them might also be skewed towards developers, which might mean that less people are hacking on the Fitbit SDK which could hurt their

The population who ditches them might also be skewed towards developers, which might mean that less people are hacking on the Fitbit SDK which could hurt their ecosystem. Apple has tried to court developers for this reason. Losing a piece of that market might be more hurtful to a company than losing a similar absolute number of the general population.