I'm asking if anyone else has had experience with this.

After talking to several credible people, apparently forward sales are not uncommon even though they do violate the contract. The reason being that (1) the company doesnt have to know about it so (2) they don't need to revalue the company and (3) its not going to be widely available to employees so they can start slacking off. Also (4) they say that a company has never sued an employee over this kind of this and probably will never because it would look bad for the company to sue their own early employee.

So I'm just wondering: who are these people and are they willing to talk about the experience? I'm told that these deals do happen.