Well I have AIM on my PC and an AIM name and login. It's just that any AOL product is designed to dominate and hijack your PC's resources. Even when I'm not using it it's a memory hog. I always have to shut down the processes manually. I just know it's communicating with other PCs about where I roam and my activity over the net. That's tracking and one of the main reasons any software is free.
Never heard of Trillion. You mean I can participate in an AIM chat room without using their software?