I'm going to make the fair assumption and say: the points are double -points- only, and literally nothing more than that. No double rakechase, no double bonus clearing, just double the points gain, aka from ~5% return to ~10% return extra as a Rakeback player (from points purely) and from 10% return to 20% return extra as a VIP player (from points purely).
This looks like more than enough to me, alongside their other crazy promo's/rakeback. If it IS double bonus and/or rakechase aswell.. wow, lol