I tried TribalFusion, they scared me

I have tried to get in Tribal Fusion as advertiser, and had a test budget of 300$ prepared. They reply me that the minimum test campaign is $10.000 ???
Is ANYBODY advertising with them? My websites are all clean and with a great potential, I was willing to target the "technology channel".
Now I am kind of SCARED, $10.000 why?

Original post by mmariusel