What the title says. More specifically, do they have anything against stumbleupon traffic, like do they maybe consider it as 'autosurf'? Because that's where my traffic comes from. It's probably just my paranoia but I want to make sure. Also I think I'm going to send them an e-mail and ask about it. I was averaging ~10-15 visitors a day and now this:
Stumble upon is suppose to be ok. They do not allow surf or traffic exchange sbut stumble upon is a social network not traffic exchange. Traffic exchanges make people click sites or show them automaticaly. Google does not aloow them because if they pay per impression and no one wants to see the ad or site it is a waist of advertisers money and no one will sell anything. Your site is fine i would not worry about it.
They might look into it, but they won't close your account as long as you're abiding by their TOS and not getting illegal traffic.
Normally they will monitor your site and then look at things like where the IP addresses of where traffic is coming from, is your site part of paid to surf programs etc. They will first investigate and probably send you a not before they disable your account if at all. Just make sure there is no click fraud going on. You can read some articles on Adsense mistakes to avoid. Hope that answers your question.
I found it to be next to zero. Those folks do not stay on your site for long - they keep on stumbling
when my site was only getting 100 or so visitors per day, a syndicated radio-show host talked about it on the air (thanks to my 'creative' marketing methods) and traffic skyrocketed.. The same thing happened a week or so later when the podcast version of the radioshow was released. A few months later when the site hit the front page of Digg.com the same thing happened.. I've also had a few surges from leenks.com and stumbleupon.com with no ill effects.. *Edit: Forgot to mention, CTR from Stumbleupon, Digg and Leenks.com all suck..
You are all right who are saying about CTR from SU traffic. It's low as hell. From ~8000 visits from stumbleupon, the ctr is around 0,3%. What a waste of traffic. :/ When people get to your site through SU, they'll immediately see what they want; no need to search for anything (except those who are interested in site and navigate further) so the probability that they will click on your ads is small. EaglezEye, I just got lucky, two of my pages got frontpaged in the Humor section in buzz.stumbleupon.com
Goomba, if you had had CPM ads you would have banked...(I think) Does anyone know if CPM companies care if you get traffic from stumbleupon?