Originally Posted by
CanadaDH
"Regularization" is the term they use when the remove your points due to 12 months of inactivity. If you had no points activity between July 13/16 and July 13/17, your points would expire. Then, presumably you had a stay on Mar 23, 2018, and perhaps had no stay in the 12 months that followed, and so the points disappeared again. At least, that's what it looks like.
Not only do you need points activity within those 12 months, but you also need a minimum of a one-night stay to extend the validity of the points to 12 months from the date the stay.
For example, receiving points from doing surveys on E-Rewards or Club Opinions will credit you with points, but will not extend the expiry date of the points.