Hey BitcoinHawker, we're sorry you were unable to get your parlay down. The "Popular Bet" message is triggered when we got a disproportionate amount of action on 1 side of a bet. We hate to ever limit action, and we can understand how it can be frustrating. We work hard to minimize the frequency that these limits must be applied, but our commitment is to always manage BitBook as responsibly as possible, which at times that means limiting our exposure, by decreasing a max.
We can see how it can be frustrating when an event has 0 remaining, and we will continue to work hard to limit the occurrences or this situation. We can look further into more aggressively moving lines to limit these occurrences. Thanks for the feedback.