Like everyone else, I've purchased the bundle but didn't get access to the paid downloads (except for Sinister Siblings for some reason, not sure why that one is different).
I've sent an email, hope to get this fixed soon.
Viewing post in Sins of Siblings (A Brother and Sister Story) comments
I help everyone who reported the issue so they can play their games. I'm so sorry about the trouble you're having. Your e-mail will be returned as soon as possible. If you made a recent purchase. A separate game must stand out as a "Paid Download" within the purchased package. However, I will send you the keys required to download the game via mail as soon as possible. Again, I'm sorry for the trouble you're experiencing.