Endorsal rocks. I took about 20 minutes to set things up, created a special link to send to my subscriber list (which prepopulates the endoform with the recipient's name and email, created a small reward for leaving a testimonial, sent to my list asking for feedback, and in a few hours my first endorsal campaign has netted me 137 reviews and counting (literally every few minutes I refresh the page and new testimonials have come in). The stack with FOMO and rewards for feedback is the best deal, and one I already am happy I jumped on.