IP is CloudFlare 126.96.36.199
It's just an anti scam website designed for logging fake popups. Obviously MBAM has detected the popups logged as malicious & blocked the site.
(Note: I am not affiliated with popupdb.org)
Is it possible to know exactly why it has been blocked btw? Or is it automated? I've been having a lot of bad people attacking my website lately, it wouldn't surprise me if this was because of the same people.