for being "lazy, uncreative developers." they have published at least 850 games since 1982, for roughly 34 games/year. Out of those games, they have all of thier sports games, with madden being insanely popular (and a monopoly on official NFL football). They also have some great games in the following
Battlefield 1942 (2002) Windows
Battlefield 2 (2005) Windows
Battlefield 2142 (2006) Windows
Burnout (2001) Gamecube, PS2, Xbox
Burnout 2: Point of Impact (2002) Gamecrube, PlayStation 2, Xbox
Burnout 3: Takedown (2004) PlayStation 2, Xbox
The Command & Conquer (all versions)
Half-Life 1 Anthology (2005) Windows
Half-Life 2 (2004) Xbox
Medal of Honor (1999) PlayStation
M.U.L.E. (1983) Atari 8-bit, Commodore 64
SimCity (1989) Numerous platforms
SimCity 2000 (1993) Numerous platforms
SimCity 3000 (1999) Macintosh, Windows
SimCity 3000 Unlimited (2000)Windows
SimCity 4 (2003) Windows
The Sims (2000) Gamecube, Linux, Macintosh, PlayStation 2, Windows, Xbox
The Godfather: The Game The Blackhand Edition (2007) Wii
Sure they repeat some of the games for multiple versions (burnout 1,2,3) or whatever, but all three of those were enjoyable games, and like most of the other games with sequals is different than the previous itteration (unlike the sports games, which really can't change much). They also have tons of different types of games.
Why start such a stupid waste of a thread, if you really wanted to know why they are so big, you could have just gone to wikipedia and looked at thier list of games and realized they are more than just Madden re-hashed every year.