How to not pay taxes on money generated by crowdfunding

In the recent years, there has been a steady increase in the use of crowdfunding platforms (e.g., kickstarter.com and crowdfunder.com). Such platforms allow any Internet user to receive funding for his/her projects. Quite often, the initiators of crowdfunding projects collect a lot of money. For example, in 2015, a color e-paper smartwatch collected more than USD [...]