I think if you have an established player who can jump into your area without a large investment it makes sense to keep your project a secret. The initial jump

I think if you have an established player who can jump into your area without a large investment it makes sense to keep your project a secret. The initial jump you get on them before they can counter could be enough time to gain some traction. This probably isn't always the case and I think most of s probably err pretty heavily on the side of caution, I know I can be secretive at times for little real reason. Just would hate to release something then around the same time have a competitor steal the limelight with a release that addresses everything you were doing to differentiate your product.