RedHat (or Ubuntu let's or SUSE Linux enterprise) have reactive support: call them if something goes wrong, and the, have proactive collaboration with paying cu

RedHat (or Ubuntu let's or SUSE Linux enterprise) have reactive support: call them if something goes wrong, and the, have proactive collaboration with paying customers. If you think you don't need that: use free riding flavours i.e. centos/ SUSE leap/... Tech support can tell by looking at the system if you are a paying customer or a free rider. And sales can look at the download numbers and management servers if your installed base is what you claim it is.