"The steady leak of its best workers to direct employment arrangements with its own (now former) clients." This is a huge hurdle in any direct services market. While you're not likely to hire your own private driver and thus end your working relationship with Uber, you're probably very likely to find a cleaner that you like a lot and who does a great job cleaning your house and go on to form an exclusive working rela…
I think it's an important question any entrepreneur has to answer: what value do I add to the business? If you're providing some expertise or startup costs to purchase expensive investments (buildings, machinery...) or creating some sort of efficiency of scale, you've probably got a viable business. If your business plan is to skim money off of workers who could do their jobs and get paid without you, your workers ar…
Lead generation is a viable business, as demonstrated by Yelp (and previously Yellow Pages), it's just not hot and fast-growing.