(Founder) We are not charging during preview. If anything, I wanted to be transparent about our planned pricing. Our mission is to make streams a cloud storage primitive, and I worked backwards from there in terms of our costs and expected costs looking ahead once we can scale a bit - based on concrete data points about what kind of discounts can be unlocked. I realized it was premature based on the comments here, so the price for internet egress has been updated. Thank you for your feedback.