Trafficz no more exists, now it is part of Bodis.
From some months I use only internettraffic.com for my parked domains and, for few domains, parkingcrew.com. In the recent past I used also voodoo.com and in the gold era of parking (some years ago) many others providers.
Now I also use domainadvertising.com for my google failisted domains (domains which cannot display google feed), earnings are lower, but for some domains related to jobs, education, games,RPM is not so bad, 5-10 USD (even if with google feed earnings for these domains are much more).
When I started with domainadvertising.com, about one and half year ago, earnings were better, 2-3 times better.