For the Personal, Indie and Pro plans, points are awarded on a monthly / yearly basis. Any unused points are carried over to the next month / year. You get free lifetime access to Quixel Mixer and Quixel Bridge when you buy a subscription.
Should your points run out there is always the option to top-up with more points.
Quixel Mixer and Quixel Bridge are becoming completely free to use with our upcoming updates -- even when you don’t have an active trial or subscription.