Any tips on finding (micro) influencers to help promote your product? - rev share

Hi guys!

I'm the maker of SocialJuice, an all-in-one social proof tool focussed around video testimonials.

I've been sending out messages and emails to all these people asking for a potential partnerships, my messages are short, and the offer is quite generous, however I never get any responses. Do any of you guys have any experience with this, tips you could share?

I'm looking for partnerships with small influencers to get the word out about my tool.