No, it's because open source competes with some of their upsell offerings and they want to preserve their auxiliary sales. As for whether it meets your require

No, it's because open source competes with some of their upsell offerings and they want to preserve their auxiliary sales. As for whether it meets your requirements, that's entirely dependent on context. In most cases it's a perfectly valid choice as long as you understand that you're taking on the associated maintenance and certification burden. In our case, it included stuff we had written and open sourced ourselves.