I would like to limit the sign-up to events to people with points. That way, I can limit how many events each customer can participate in.

I'm selling a product in which customers can choose 4 (but only 4!) workshops.

I can give them 4 points when buying the product, and I "charge" 1 point for each workshop. At the moment this can only be done with a product for each workshop.

I would love to use events rather than products for the workshops, as the events gives the customers a much smoother experience.