I am usings VPN and taking PVA email accounts and sign-up on yelp with those. I am uploading a profile picture (stolen from facebook), filling out birthday, location, ... And then I am surfing for 5-10mins on the site and logging out. I randomly log in to the website and then search some more and like stuff for the rest of the week. After about a week I am going back and posing 1-3 reviews over the span of the second week. My vpn is using geo targeted proxies as well. All of my reviews about 90% are filtered within 3-5 hours. I think it might be the proxy provider that I am using. If anyone has gotten reviews to stick some pointer would be nice.