Working on our project we gathered interesting statistics and hacks for founders. By our stats about 5% of all campaigns is scam, 10-15% of campaigns reselling products from Ali with doubled price, 10-20% use platforms as mass selling channel.
Ps: For now project in Alpha, so we don't have full coverage of all campaigns on Kickstarter and Indiegogo, but we are trying our best to make this possible in future)