Quoted from manadams:

Scott Danesi has a full time job with Pinball Life and does these games on a part time/contractor basis. Maybe Spooky approached him at one point of leaving his main source of income but even if they did, not everyone has the faith to do that like Charlie did to create Spooky. At the end of the day, Charlie created Spooky to make games they wanted to make not what someone else's vision of their creation may be no matter how great of a game maker/designer they may be. I don't think Scott is done collaborating on games with Spooky, just not going to be every game that they manufacture.