Macadam's coins and Weward's wards expiration date (?)

I am aiming to reach gold status with the Macadam app (almost there) and premium status with Weward (way behind with this goal...) in order to get more "value" from my coins and wards. I searched online if there was an expiration date for these apps' "points", like 1 year for each points acquisition, but I couldn't find anything.

Do you know if the "points" remain on the account forever or do I have to cashout within a certain time frame?