busted loops has compiled a list of top publisher on the appstore arranged according to total application listed x total cost with iceberg reader at number 1 with a total of 1206 applications, followed by Khalid Shaikh (im not surprised here) taking the number two spot with 986 applications. check out the link: http://bustedloop.com/blog/2009/7/7/how-much-does-it-cost-to-buy-every-iphone-app.html
uhm no gameloft would be very very low on the list, this isn't a list of top developers, its a list of most app x most money, gameloft only has like 20 something games and the average price of them wouldnt be much higher than 4 im guessing, means it wouldnt cost much more than 100 to buy all of gamelofts games, but it costs $16,427.94 to buy all of icebergs and $4,714.14 to buy all of Khalid Shaikh
Well, Iceberg sells books which are already all written so it wouldn't be difficult at all to amass a huge number of apps. They're also coming out with an Iceberg store soon too. Although, I would never buy a Khalid Shaikh app so if someone were to buy every single one of his apps, that person deserves to be kicked in the nuts six times, and then buttraped until he couldn't sit down for a month.
Unfortunately, it would be Brighthouse Labs. They currently have over 1,600 apps on the App Store, and each and every one of them is a steaming pile.