Op, you should change the thread title to 1% house edge since the .5% only applies to special events which is misleading.
Good luck in this business but it is very competitive and you will have a lot of angry players so be prepared for that.
I was attracted to the sites because of the very low house edge of 0.5% I hope the house edge continue to apply even after the important event and ops should also make it clear what the house edge will be after the event, so as to make our choices if to stick to yoy r gambling site or move to another.