Yep, rarely do devs add more code just for fun. They'll do it when the incentives are misaligned (e.g. the new modern trend of LOC changed), or doing stuff like "speed loops" to appease really shit management.

Usually when there's some obscure extra rule in the code it's because there was some hardware fault, an undocumented use case, a complaint from a key client, or an intermittent failure.

Anyways, I'll be sitting over here with some popcorn.