Freelancers and consultants do absolutely have the option to get paid by the feature. It’s exceedingly rare for internal employees or contract employees though. That means there’s no market competition based on it yet. Some places do have bonuses or even profit sharing. Some senior ICs and many managers across the industry can get equity through either grants or options.

Sales professionals have a lot of different places they can sell things. The market-rate compensation for sales includes commissions. So to get the best sales people, you want something easy and exciting to sell with a good commission structure tied to the sales.