How does bubblews earn money

Like others it was also my question how does bubblews earn money. No doubt at this moment it is only best site which is sharing their revenue with members. Their members also increasing day by day. If you think a bit you will observe they have kept 3 or 4 advertisement in per page. Which are paying bubblews as per impression and as per click. Bubblews traffic value is so big. So they can claim a high rated add fee. I think if they continue like this they will be a ziant company in some days like face book or others. I am happy to be a bubble user. I hope they will keep continue like this by sharing their revenue as peoples are doing a hard work here