I was amazed when I downloaded Zacc's map pack back in Oct when I first found the original post-link, and when I looked through them to get a feel for the maps my new party would be using, I fell in love~! I especially loved the fact that Sir Zacchaeus even went and made a map for the Yawning Portal Tavern! It made it a little easier for my players to figure out where they were in relation to the enemy mobs.
I can understand why the FG Devs decided to include the map pack in the actual module bundle - with how much work went into these maps (it took you 3 weeks? That's pretty speedy for 50+ maps! You're the Map-making king!) the last thing I believe the FG devs and even Zacchaeus want would be to see these maps used for another program it wasn't created for - otherwise, like some others have already said, he would have just posted the maps to somewhere like the DM's Guild. So no haters or flamers please, especially when the devs have clearly stated their point of view / reasoning.