Unlike many other companies (and EA specifically) Epic does a terrific job of supporting their releases with bugfixes and patch releases. They also release *LOADS* of free content in the form of bonus packs.
Personally, I wouldn't be averse to seeing adverts in-map if it meant that Epic could fund continuing support of UT3 during its lifecycle. We, the players of the game would benefit from more timely patches and more *GOOD* maps.
Would gladly watch adverts for a constantly updated UTSecure.