If a company or individual posting to craigslist is having trouble with competitors, fake posts, harassment, etc., there are a number of ways to get things done. I'm sure that Craigslist, like every other site, makes people jump over a few hurdles before they can get in touch with a live human.
Calories Burned. On average, a 150-pound person burns 91 calories biking for 20 minutes at a leisurely pace of less than 10 miles per hour, according to the Calorie Control Council's Get Moving Calculator. The caloric burn increases to 136 calories when intensity escalates to a moderate pace, 12 to 13.9 miles per hour.
How It Compares. The stationary bike provides a good calorie burn and cardio challenge when you push your intensity. In the same 30 minutes, a run at 5 mph burns 236 calories in a 130-pound person, which is less than a vigorous-intensity session on the bike. Once she speeds up on the run, however, she will burn more calories.