Beauty Clout is another one to checkout.
It connects your store with the Shopify App and imports your products to make it easy to create campaigns for influencers.
Have you found a platform that works for you?
I've developed something similar for a friend who runs a Shopify store: https://apps.shopify.com/acornlinks
Acorn Links generates promo codes and sharable links for your influencers. It then monitors for purchases referred and automatically assigns points / rewards them with store discount codes.
I think it would work well for micro-influencers or customers with larger social media followings. Probably won't work for larger influencers who expect to be paid.
Either way, would love your feedback if you get a chance to take a look.