Pretty clear on the website:
Member benefits
* Over 2,300 participating hotels worldwide!
* Extend A|Club points indefinitely
* No blackout dates on hotel rewards!
* Convert to Airline Miles
Points expire if there has not been a stay in the last 12 months, stay just one night the total points are valid for another 12 months.
However I can see how people who sign up without reading the small print might be confused. That's what FT is for
