URGENTLY review your affiliate popup advert banners when viewing the site on a mobile
Viewing the pitchero website using Chrome on an android phone produces very aggressive popup adverts, which lock the browser completely.
See attached screenshot. There was a different one last week which suggested that the phone was dangerously infected and 'click here to disinfect'. Most users will probably click through.
Only way to remove them is to force close the app, or to click the 'ok' button, which I've not as it'll probably reset my home page or take me to a malware link..
This can be reproduced using different android (un-rooted) phones.
You should really sort this out ASAP