The distinction isn't irrelevant. Zombicide is a game whereas reaper bones is not a game at all there is no collection of a system of rules to apply using them. It is just miniatures that can be used in other games.
I would consider parts that can be used in board games part of the board games ecosystem and market though. Even people making those dice sets, dice rollers, and such are supporting the board game market. So the distinction is irrelevant.
In any case, even if you left those out, I see many pure board game kickstarters being successful. I would love to see a comparison of the board game kickstarters compared to all of the video game kickstarters.
In any case, even if you left those out, I see many pure board game kickstarters being successful. I would love to see a comparison of the board game kickstarters compared to all of the video game kickstarters.