and welcome to RHP.
Firstly, you are able to buy just a months subscription so you don't have to
pay out a wadge to sample what is available to a subscriber.
Anyway, from what I remember, the added bonuses that are available to subscribers are: -
1) Unlimited amount of games in progress. This seemed daft to me when I first subscribed because I thought that 6 games were more than enough for anyone. This is, however, a correspondence chess site. You might know this already, but this means that people can take days or even weeks to make a move, so having lot's of games on the go can make it more interesting if you are quite involved inthe game.
2)Ability to enter tournaments. This is also a great bonus here. Entering tournament can really pump up the adrenalin and increase your desire to win games, improve your playing, work on your openings,.
3) Play in siege games. The siege games part of the site is where people compete to stay on the same board. A bit like playing pool in the pub when it's winner stays on.
4) Give other people recs. Erm no scrap that one
5) Join clans. A clan is like a bunch of people that get together like any other sports[athletics] team and play other teams.
Yup go for it
If you're pondering about the financial commitment, just go for a month subscription and try out all the features.
I reckon you'll end up paying for a year after your ry out period though.
Welcome to RHP