I got into TZ a few months ago, not too recently. I was originally rejected and then re-applied with the same exact list and was approved. This is what worked for me, although I am not sure if it will work for any of you.
1) First of all I applied with 110 domains instead of 100 just to be safe. You can imagine my surprise when they said that wasn't enough(see
#2 for why). One tip is to apply with many more than 100 if you have it. If you apply with 200 and get accepted, you do not have to move over everything that was in your application.
2) Check for typos. I had about 10 typos in my list, and by that I mean that I sent them mispellings of my actual domains, not that they have a problem with typos in general. Some I actually had a mispelling in the actual domain, others I had mixed up the extention (i.e. putting .com when I really owned a .net). If you attempt to apply with domains that you do not actually own, even just a few, I think it raises their fraud warnings and you get rejected.
3) Resend you list of over 100 domains and write next to each domain the traffic it has been receiving parked where ever it has been. That way they do not have to estimate how much traffic it will get based on a combination of links or Alexa or whatever system they use, but they will actually have verified traffic stats from Sedo or Namedrive or somewhere else.
4) Finally, add up the total average monthly traffic the portfolio you you are applying with has been getting. Then, at the end of the message politely say something like "These 110 names have been averaging 30,000 visitors a month at these other parking companies. If this is not enough please tell me how much more is required or how close I am." Hopefully this will take a lot of the guess work out of it and they will give you a real answer as they did for me. My account rep over there is very good at answering questions now that I am on.
5) I can not say for certain if a referral helps or not over here. It is obviously not necessary like it is at SedoPro. It might help it might not.
Hopefully this information helps some of you guys to get in or at least get more information from them about your rejection. If you still can't get approved, there are other parking companies with less strict requirements which are just as good or better in many respects. Check around, it is always best to use a bunch of parking companies anyway.