The phrase "hungry crowd" refers to a large group of people who are eager and interested in something, usually in a figurative sense. They are eager to learn or consume more about a particular topic or are eagerly seeking what is being offered.
There are tons of bars scattered around the island, all filled with a party hungry crowd. (ithaka.travel)
So, while you build your own platform and list you can leverage the work we are doing and have done to assemble a very hungry crowd of readers, that want to know about your book promotion! (readingdeals.com)