@Niche-Digger
I feel with you, when your Linkpushes not work for you.
But i am a happy member of Linkpushing.
To your Top5 Reasons:
1. Greg promised that all 404 pages from the private Network will goes to a new server,thats the reason why this sites are down.
2. That can i confirm, but after write up Greg, the become a re-do
3. BTB is a little bit overloaded in the moment, but i know this will be changed soon. I have sometimes chat with BTB and when he not answered i shot him a email and when i didn't become an answer i send a pm. Then all is good

But this was really rar.
And BTB has a lot of work, not just the linkpush service, but he is still there to help us.
4. That i cannot confirm.
I had started 3 pages end of juny with each 60 articles per month. Since mid of July i promote it with each 60 linkpushes per month. All innerpages from the 3 sites ranked from 5-200 after 2 month.
We cannot expected to make 5 linkpushes to the root domain and we hit rank #1.
It is important if all is correct with onpage and so on.
BTB said more then once, we must make other linkbuildings and a regular flow of articles. After this Linkpushes are working fine.
5. I know, many have problems with the first 4 points, but i think, many people should think outside the box.
Hope i could help with this little overview.
Cheers
Dang3r81