These sites are pure scam.
Apart from what you can find about them on the web, apart from the complaints of men (do a google search), apart from the fact that they place fake profiles on other dating sites, like friendfinder, trying to steal traffic for their site, and apart from what Jim has to say about them: (http://agencyscams.com/Why/interlingvo.html
), we made a simple experiment.
Two guys placed profiles there as American men (one paid, one unpaid). Immediately, within an hour from registration, their mailboxes got clogged up with messages from "girls", mostly from China, plus some Russians.
Then I placed a profile there as a Russian woman and sent them both a message (their site is free for girls). My messages are still sitting in my Outbox, and were NEVER delivered to the guys!!! Nowhere to be seen in their Inbox!
This means that the messages from REAL women who register on their site never reach men's mailboxes (paid or unpaid)!!! The only messages that guys receive are the ones that site WANTS them to receive (i.e. sent by the site's staff, from fake scummy profiles).
After registration at interlingvo.com, all men are being redirected to one site (like yournewlover.com) and all women are redirected to another (like forhonest.org). Though it looks like those are the same site and share the same profile database, you can see profiles of each other and supposedly message each other, but you cannot login at "another gender" part with your username, and messages from real women to real men aren't being delivered. The site owners put real ladies at "for honest" part of the site and make sure that their anoying messages never reach men and are not in the way of their "business"!!
The site is run by Russians. I can bet that all info in WHOIS is a bogus, no point of even looking there.
Don't just walk away for that site, RUN!!!!
I just wonder, how many other "agencies" operate like that?? Deliver to men's mailboxes only their own messages?? may be worth registering as a Russian woman on the several agencies and check what is going on