I've never heard of that service, but, I've been doing crowdsourcing for years.
Amazon's Mechanical Turk can be a good one, but, sometimes it's tough to find decent hits.
On occasion you'll get surveys, but, mostly it's kind of data scrubbing or collection.
Some of them are transcribing business cards or approving/denying photos for appropriate content, or adding word tags to photos... random stuff. These gigs are how I paid for baby clothes and college textbooks, lol.
iPoll does surveys, on the pc or phone app.
GigWalk does data collection, some of which is photo taking.
Microsoft hooked up with GigWalk last year to pay something like $15 to photograph restaurants inside and out that would show up in Bing. If you went to one bustling neighborhood you could make a couple hundred dollars in a day. BUT, hits that pay that well are a little on the rare side.
I didn't do those because of the crowds, but, I did do a couple in movie theaters and starbuck's... they ask you to take a photo of something inside to prove you're there, and then you rate things like noise level, cleanliness, etc. oh, a couple times I had to record the noises.
I'd be interested to hear about some other crowdsourcing companies people have used successfully.
I used to do one a few years ago... Greensomethingorother... but, they switched from cash rewards to a point system. ~smh~ Not as motivating.