I work at a non-profit and there is no incentive at all to ride. I have some friends that work in local tech companies that have all sorts of cycling incentives and I feel a bit jealous sometimes. I would not want to wear a jersey with my company's name as I ride to and from work, even if they paid me. I might do this for a one-time charity fundraising ride...
Maybe more companies would offer incentives if they also received incentives to offer this, like tax breaks, etc.