These persons mostly don't answer your specific questions and don't give much personal information, but use general (predefined) text for their letters.
To be very serious in your intentions and to be very open to her, gives you a response which you can analyze as reliable or not.
or those that insist in a aggressive way to buy products or services from them which you never need.
And you, blind of love, thinking about that beautiful young woman, are an easy potential victim for them.
Perhaps their introduction or 'About-Us' pages or other relevant pages could give you some background information of this specific Dating Agency, which could give you a 'good' or perhaps 'wrong' feeling about this site and their services.
Also try to find out if they are a member of the Anti Scam Program.