Why Certain High-Tech Firms Favor Reimbursement

Historically, IBM was the largest company offering a corporate reimbursement program. In its heyday, IBM had more than 25,000 drivers on reimbursement. However, since then, there have emerged major company-provided fleets operated by hi-tech companies, such as Hewlett-Packard, Apple, Intel, etc.. Despite this trend, certain high-tech companies continue to be more receptive to driver reimbursement programs than company-provided vehicles. Why is this so?