I heard about shoutcart long ago but I was not able to get in that platform because I was having my paypal account and then it got locked because of my changing name spelling on paypal. It was a lose for me and after that I not joined any site which accept paypal.
Geting account approved is also a tricky one since they almost rejected all the multi-niche account and all instagram account that have follower less than 10K,
But since it's all targeted they got so many advertiser especially in travel,fashion and luxury niche ,
I hope unboxed will have a same standart (or maybe higher) with shoutcart when accepting worker (influencer)