2 tickets per member per show.

At some shows the demand is quite high so you have to be quick and in time when the sale starts. Some shows the good tickets sold out in seconds.

I don't know about which country you are talking. For Europe where we have generell admission the fanclub pre-sale is worth it because with fanclub tickets you get entry into the venue before anyone else.

For USA I don't know if it is worth it. Some people got better seats at TM than at the fanclub from what I read.