The only negative tweet (which was't even negative) was:

"@keen_io Don't worry, I don't click on link bait. Tell me what you do if you want your product and not just name get my attention."

He was friendly. We tweeted back an forth and turns out even though he didn't like the ad style, he still went to our site!! :)

"@keen_io I typed it. Curiosity got the best of me. Good luck converting, you're on my shortlist. I was just thinking of analytics today.