I'll start: 1) The ability to go no-opportunities. When you're not looking for work, you turn this on, and you will not turn up on any search result. 2) Simple export API, with a guarantee of you having complete say over your data. You may export as a json anytime, and import into another service. 3) Non-profit is possible. A resume directory can be run by a few people with a small revenue. Trying to make a unicorn is what leads to linked-in level shit.
Others?