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.
Likewise, riding the stationary bike at a vigorous level for the same weight categories produces a caloric burn of 315 calories, 391 calories and 466 calories, respectively. MayoClinic.com defines moderate as the development of light sweat after 10 minutes of activity and the ability to carry on a conversation.