The site and app is in fact a total scam.
As many others have said, you are introduced to a person via another app (in my case, Badoo) and they mutually like you. They then claim they have issues understanding you and direct you to Perdate to "improve translation". Perdate requires you to pay just to talk, which was $40 odd AUD.
However it doesn't stop there. The girls convince you to join VIP which is $160AUD, so that you can exchange photos and translate better.
Once you have that, they talk to you all the time and say they like you, and they miss you etc. They really bait you into believing this crock. Then they send you numerous gifts, and shortly after request that you send them gifts (which cost more money).
Most of them use the same phrasing, and claim that they will visit you. When you ask them to chat on another app which is free, they claim that they don't want to waste their VIP membership that they have paid for by talking on another app.
Also, they all seem attractive. Perdate is a total scam, and all the "girls" just lie and get you to invest more on the app. I have a case going with Apple for a refund, and I highly suggest to stick to free apps and meet the person before you spend $200 odd bucks like I did being an idiot.