Social networking sites are not simple to build, and many sites went into this adventure without thinking all the way to the end. Plaxo for example failed to understand to problem and they reached their limit.
A social networking site present a technical problem, multi layer database. Each member has its own network (database) while all the system has its database. The bigger the system the bigger the problem it posses. Plaxo is one of those that reached its limit. as a result plaxo is limiting its users to 1000 connections (quite a ridiculous number) once you passed this number you cannot accept or send anymore invitation. oh don't worry they will keep asking you to invite but will not procceed. In may case the limitation was placed after i reached 2000 contacts and now i am completely unable to access plaxo, and the tech support admiited it is from reasons of functionality, and they want me to delete 1000 contacts, which i will not, it is an impossible demand but also an unfair one, because the user bothered and collected them, gave plaxo traffic now plaxo want the user to abandon them and leave them to the system only.
So if you have a business network on Plaxo… start moving it somwhere else.
Ning is good, Marzar is good and any other network that will not limit you or block you later.
Issues with Plaxo
I had the same problem I had thousands of contacts on plaxo and now I can only access the site through an old bookmarked URL customer support was useless I even let them use citrix to control my machine to try and access the account and then heard nothing.
My account is restricted to 1000 contacts and cant accept any more it is useless and I cant access my contacts to export them. I get sent messages all the time like x has added you as a contact.
It is a shame because I liked plaxo when it first changed but it seemed to get worse after that for me to use and that is why I canceled my plaxo premium account.
You are right on marzar the networking is not restrictive and the site has an open network meaning you do not need thousands of contacts to get visibility in the network it means that the site acts as a directory and everyone is visible.
On marzar you can share files or distribute company information, join and take part in group discussion, advertise in the marketplace or publish blogs to promote business or personal brand and more….
marzar.com offers a different service to plaxo and linkedin check us out