Can't report directly about either, but I will happily volunteer that I would never have anything to do with an mmf.
It has nothing to do with being open-minded, it has to do with knowing absolutely that I have no desire, interest, or appreciation of having naked sexually aroused males anywhere near me.
Another clue of a pretender is a woman who has a poorly written profile.
As is typical with online dating, expect a response rate of around 1-10% depending on how good your profile is.
Hopefully you will all have fun meeting singles and try out this online dating thing...
Remember that we are the largest free online dating service, so you will never have to pay a dime to meet your just curious if mmf threesomes are easier or harder to arrange than ffmand how many people would be open to doing something like that.maybe its just good to leave it for pornbut depends how open minded you are.
I recommend sites from time to time, not because I get a tiny commission if you click on the links and make a purchase, but because, I want you to focus on the places that will deliver you the most value and the best results.
Plentyoffish dating forums are a place to meet singles and get dating advice or share dating experiences etc.