Its when you play these free or not has time frame from date of start whether monthly or weekly based on how many players entered the tournament you will either get a notification of when the time is up . The only way is by periodically check in from time to time ,but if anyone missed the time frame its an automatic DQ .IMO
Example :
BETHPAGE BLACK
Compete in this 36-hole multi-round tournament on Bethpage to win WGT Credits. Open to all countries except for the U.S. States of Montana, Tennessee, and Vermont. Round 1: August 1 - August 8 Round 2: August 9 - August 15 Round 3: August 16 - August 23 Round 4: August 24 - August 31
P.S . When go into your profile page in the middle clicked on the tournament you have entered will pop up the time frame of when it is near to the end of tour .