The sustainability thing around the business model is only an issue in the long run though right like you don't need the ads to start at the outset. i think for the most part they see ads as a means to an end unnecessary means and one which certainly has to drive certain product decisions but i it's hard for me to think that it wouldn't end up booking much like much like facebook  i mean the reality is facebook has been around for what is it eight years now nine years um and i i don't know if there's some other angle to look at this well let's assume that it got off the ground"