From that perspective, making Gears of War for the 360 as a timed exclusive was wrong since their fan base has always been PC. It's not like Gears was their first successful game, only their first big console game. Consider how you'd feel as a PC gamer who bought every Epic game, if you get your panties in a twist over some exclusive content, and think how you'd feel then.
Personally, I think it's all business. It's not like if Konami ported MGS4 I'd throw a hissy fit and not buy the PS3 version.
Most importantly, if there was no PC version, and no extra missions, you'd be perfectly happy with them. If they delayed all versions of UT3 til Xbox 360 was done, or just canceled the game, you'd be happy with them. It's not even about gaming to you, it's just jealousy. You sound like some spoiled kid who grew up without any siblings. Honestly just look back at this thread and read over what you've been saying.
Is that what gaming is all about, being so fucking wrapped up in jealousy of rival consoles you get pissed off when they get something good? How many exclusives has PS3 lost? Did I go bananas when Virtua Fighter 5 came to 360? No. Was I pissed off they got online? No. It doesn't make my version worse. I didn't go around bashing Sega, I fucking love their game.
If it's actually deeply important to you that nobody is allowed anything better than what you get on your 360, you need to re-examine why you're even into playing video games. Cause for a lot of people, I don't even know.