In retrospect, it seems odd that someone who had been blacklisted for Game Show rigging (although he claimed to have had no involvement) would attempt a comeback through a show based on a slot machine. In casinos, slot machines have been known to be rigged, and Barry-Enright did show they had some (honest) control over the windows' content by displaying slides showing the show's title before commercial breaks.
To be fair, many people who have been behind the scenes have verified that the machine was pretty much impossible to rig. Also, it didn't hurt that the questions were usually about as easy as a $200 question on a Jeopardy! kids' week...
Here's an oddity — why would Barry drop the celebrity panel for the 1969 pilot, only to bring them back for The Honeymoon Game in 1970? It's kind of understandable if McKrell had good interaction with celebs (to be fair, he does ask the questions in the finals) and the 1968-69 contestant podium was still laying around, but it doesn't make much sense to go back to something that didn't work the first time. One could argue that since it was planned as a weekly series, having five celebs come in for 20 minutes or so wasn't such a bad idea.
Looking again at the second pilot, the slate says it's a dress rehearsal with no celebrities.