I once went to a small craft fair - about 12 or so tables. No less than 4 of them were women selling Lularoe. People were buying from the woman closest to the door, but no one had any interest in the other three. Depressing. If you have the skills to market yourself I imagine you can do quite well with these sorts of businesses, but the market is so saturated right now that you really have to be exceptional to stand out and really make a go of it.
On the flip side, if you put in the time you can learn some great skills that you can roll into other areas as well. Just like anything else in life, you get what you put in.
(says the person who grinds out surveys for $6 an hour on a regular basis...)