I have personally heard so many stories of people saying they will quit Facebook - mostly for time or professional reasons - but at the same time, there are also many others who join Facebook every day. Thus, as an online marketer, are you worried or concerned about Facebook quitters and not being able to reach your target segmentation?

It's true: some stay, some leave, some return. Also, its interesting to mention that though the early adopter or late adopters will leave, there could also be an influx of the late laggards joining Facebook and Twitter which changes the consumer mix of these online communities.