"HI HN, WE ARE BUILDING TINDER, BUT FOR LANGUAGE EDUCATION, WITH INSTITUTIONAL CERTIFICATION.

WE'RE TESTING IT AT THE UNIVERSITY OF VENICE, AND WE'D LOVE NOW TO DO THIS ON HN AS WELL.

YOU THINK THAT'S A BAD IDEA, WHICH DOESN'T SOLVE A REAL PROBLEM? LET US KNOW WHY."

Your first paragraph is not informative at all. What if I don't know what Tinder is? You're suggesting that maybe your idea is bad (and we should tell you why) about 1/2 a screen before telling me what your idea actually is. How about putting that sentence "CoffeeStrap is a place..." right at the top?

p.s. I think your idea is great! But I need more help understanding what's going on :)