"At the end of August, we began testing a new type of small monthly subscription that we believe can be a powerful new tool to grow our business, attract new customers, and better meet the needs of existing ones. These subscriptions offer customers a small number of downloads per month (10 or 25) at a very attractive price point (starting at $40 for 10 Essentials downloads per month; $99 for Signature). These subscriptions are performing well for us, increasing our new customer conversion and the amount that customers are spending with us. As such, after two months of testing, we now feel confident that these products will be a permanent part of our ongoing product offering and as such, we are announcing a new royalty schedule designed to support their introduction.
... We will also be retroactively applying the new rates, for any image downloaded by the new products since they launched (August 25, 2015), to your accounts by the end of November".
Там еще всякие подробности. Было прислано на имейл в конце октября.