Let's take this apart, bit by bit.
You agree to grant to KBOARDS.COM a non exclusive, royalty free, worldwide, irrevocable, perpetual license to reproduce, distribute, transmit, sublicense, create derivative works of, publicly display, publish and perform any materials and other information you submit to any public areas, chat rooms, bulletin boards, newsgroups or forums of KBOARDS.COM or which you provide by email or any other means to KBOARDS.COM and in any media now known or hereafter developed.
Standard stuff - this is primarily so they can publish our posts without us coming back and demanding a royalty. However, this is missing the typical limitation I see in most other TOSs, which limit the license to use only for the purpose of operating the site. Notice that this license does not include a right to charge for whatever we write here. (i.e. - they can't distribute for sale - they can just redistribute.) As for copyright, the fact that they are having us grant a license implies what we write here is, in fact, copyrighted. (Otherwise no such license would be required.) An important term here is "public areas." They don't mention PMs. Implication: PM contents do not fall under this license. The bit about providing material by email or any other means would pertain to stuff not submitted on the platform. For me personally, the fact that they are not limiting the license for the purpose of running the site bothers me.
Further, you grant to KBOARDS.COM the right to use your name and or user name in connection with the submitted materials and other information as well as in connection with all advertising, marketing and promotional material related thereto, together with use on any other VerticalScope Inc. web sites.
This part - the one everyone is really complaining about - pertains to a little number called moral rights. That's a legal term and it deals with a person's right to control what is and is not attributed to their good name. Some publishing contracts contain clauses like this so they can bandy about your name without having to clear it with you first. (And they often use the actual legal term "moral rights.") I've never ever seen a TOS that explicitly requires a waiver of moral rights. If I were somebody whose brand is actually worth money, I'd get with a lawyer on this one.
You agree that you shall have no recourse against VerticalScope Inc. for any alleged or actual infringement or misappropriation of any proprietary right in your communications to KBOARDS.COM.
Well, here in the U.S., you can't sign away your right to litigate. Most TOS and EULA agreements these days have an arbitration clause. Here, they are flat out saying we are agreeing not to do anything at all if we disagree with their use of our content. Even if they legally infringe your rights! ("actual infringement") I've never seen any such blanket disclaimer in a TOS. I have, however, seen such a disclaimer defeated in court time and again. Once again, if I had a valuable brand as an author, I'd run this whole thing by my lawyer.
For myself personally, I understand it well enough to know that VerticalScope can and will do just fine without my patronage. There are plenty of media on the Internet where I can express myself without signing away my moral rights, without granting an unpaid license to my content without limitation and where I am not expected waive my right to arbitration or litigation in the event somebody actually infringes my legal rights. (That last one actually makes me giggle. But not enough to stick around.)
See you in the funny papers.