I guess tie ins are addictive?

I remember there was some complaints about Batgirl #13 barely having anything to do with the DOTF tie in but being advertised as such complete with the die cut cover. RHATO #13 wasn't solicited as a tie in although it had about a page and a half teaser. Just the idea of the evil Joker could do in those panels caused a mini uproar in the fandom. But now we find out that those same pages caused this issue to sell out and warrant a second printing. Huh.