Also, the possibility for automation is then great as well. Companies could offer assistive devices and software to the freelance shelf stackers for increasing their productivity, all they way to full blown robots.
Can also apply this to other tasks such as crowdsourced burger flippers and crowdsourced cleaners.
There's a lot of opportunity in automation of service businesses such as retailer and restaurants, but it seems like the industry does not take much interest in applying robotics to the task. This crowdsourcing system would be a way for nimbler companies to introduce more technology into the system without going through the management.