Where it sees a future source of revenue is in major enterprises through a paid - for service, which will initially be rolled out for free. (siliconrepublic.com)
That's why major enterprises hold on to legacy technology that's near end of life. (quantumtechresumes.com)
Customer training can also be offered for free, as a courtesy to your customers, or be a profitable endeavor on its own (consider e.g. certification programs from major enterprise software vendors). (elearningindustry.com)