No-one uses the eliptial because they enjoy it. For example - would people still use it and enjoy it if it meant they wouldn't burn any calories atall, or as many calories? No. People use it because it's the quickest way to lose calories, hence why people on diets (mostly women) are always seen on them...men don't diet as much and as such aren't seen on them in the gym as much. It also barely improves your fitness atall, back when I was only using the eliptical (up to an hour) I could still barely run at a high speed for more than 5-10 minutes.
Running and the bike is so much more fun and so much better for improving your stamina and overall fitness. Personally prefer outdoors running and the stationary bike and don't pay attention to the calories I burn anymore, simply the intensity, km done and time now because exercise should be more than just burning calories. Just my opinion.