I've experienced working at one of the original talent platforms, a-connect, that emerged around the first tech boom in the early 2000s.  This is when freelance consultants started to emerge in larger numbers across many industries.  As a freelancers I've also engaged with and found projects on many newer two-sided platforms.  

Here are some of the strategies I've found in how to work effectively with these platforms both from within them and as a freelancer.