Absolutely. You risk an endless cycle of the ghost town effect in that scenario (people floating on an island by themselves, to zero benefit). I'd wager it's be

Absolutely. You risk an endless cycle of the ghost town effect in that scenario (people floating on an island by themselves, to zero benefit). I'd wager it's better to have only 100 users with one medical code, than 10,000 users all with different codes. Those 100 users ignite the function of the system, its desired feedback mechanism. I suspect there are some large, very common targets you can choose from to get started. Your challenge is probably deciding whether to target a more common medical code, or one with greater user intensity (people that are more frustrated; a higher intensity factor might be ideal for starting the system around; it's an interesting trade-off).