Gror: yea... awhile back the special of "buy 1, get 1 free" was a deal. (Normally a black rook lifetime membership costs the same as 10 year membership.) So some (like myself) was able to pay for a 5 year membership, and someone else pay for the other 5 year membership - and then both of us would get the black rook at basically 1/2 cost.
Got mine in 2006 - 2 more years and my "investment" will have paid off.