in the UK 1and1.
they once ran a 16 page ad in 3d world in two issues. I had to e-mail the editor to complain about the second issue. I ripped the pages out. 32 advertisment pages in two issues in 2008.
Now they only put 2 or 4 pages in every issue. but to put 32 pages in 3D world, and they are in every issue, they must be reliable.