Is the fee to join a onetime payment???
There is a yearly membership fee or you can pay for a life time membership.I do not remember what I paid.
You can do monthly, yearly or a lifetime membership. I bought the lifetime membership and it's around $50, one time fee. I'm not sure what the monthly or yearly membership fee is but all things considered, doing a monthly or yearly would be a waste of money basically. MaO does this so that if people like the site, they can pay for a longer membership and if they don't, then they are just out the amount of money for a monthly or yearly membership.
The only issue with having a free membership is that you can't initiate private messages or emails. You can however reply to private messages and emails sent by a paying member.
One last note, if you're one of the top 10 members to post in the forums, you will receive a full one month membership. This gives people another option to see if they like the site without handing over any money.
Hope this helps.