Oasis Active does have a live feel with most of the emphasis it seemed on the live chat service although it was a little clunky and difficult to manage multiple chats.
Try and look passed the photo and try to read into what people say about themselves with an open mind 'don't be so critical'. Chatting or engaging with people in far away (often exotic) places is only asking for trouble.
If they are locals it is easy to establish their credentials this will minimize the risk of being scammed because believe me they are out there.
In terms of the ads on oasis active I did find them somewhat distracting with banner ads on every page and some quite strategically placed below search results so they were quite easily confused with actual results.
That said it is free and someone has to pay the piper.
There are many very nice, honest, intelligent and successful people out there who could make very good partners with you however may not be as photogenic, poetic or quite frankly as attractive as you would like them to be.