In my recent post, I asked “TNX.net Users Getting Banned?“  It seems that there is only about half truth to that statement.  Here’s the response that is in the comments of that post from the crew at TNX.net

It’s just Google’s “too many links at once” automatic filter… When over 100 new links pointing to one page appear in several days, all with the same anchors (which is unnatural) – Google will likely notice you and the pages you were promoting may disappear from SERPs for 1 month (after that tey will return even higher). This automated filter is intended to keep you away from buying links, but it’s very easy to avoid the filter!

Your case doesn’t mean, that Google bans TNX buyers (there is no may Google can identify TNX links). It only means that there IS a risk when buying links without following our recommendations: http://forums.digitalpoint.com/showthread.php?t=488057

We just give you a convenient tool to place many of direct links, it is up to you to choose when to stop placing new links and how to make anchors look more natural (variety is the key), which links to delete.

Previously our advertisers didn’t have a generator to make anchors look natural. Until now! Just look at the new Step-2 of Creating campaign: you can now generate hundreds of different anchors with a click of a button.

We suggest that you now try to buy links following our recommendations and then publish a follow-up review. If you don’t do that – then… the main purpose of Google’s automated “too many links at once” filter – to scare you from buying link – is accomplished
Have you ever thought of WHY Google wants to scare you from buying links? Because it works great, when done with care, of course!”

You wrote: the reason behind it all is the super fast acquisition of links – indeed, it is.

So, the short answer is Yes, Google is banning users of TNX.net.  But it’s only temporary.  Given time, you should come out the other side smelling like a rose.  I’ve got two sites (with a third waiting on approval) that I have campaigns running for.  At the moment, I haven’t seen any of the problems with the Google filter.  One has over 300 links through the service so far and the other has about 180.  I haven’t seen any movement in the SERPs either up or down.

I guess in the end, it’ll be up to you whether you want to risk a month in the sandbox in exchange for a lot of extra links.  The sites I have in the program don’t have a whole lot of links just yet, so I think the reward will greatly outweigh the risk.