That, and likely Oracle is doing it for free (or thereabout), financing it out of their advertising budget.

Zoom is the success story of these corona-times of ours; the headline alone is marketing gold, particularly considering nobody else in the "startupsphere" will ever give Oracle this sort of visibility - or even the time of day. At a time when Oracle is trying to push an image of being startup-friendly, this is better than the alternatives (each word they tweet on "helping startups" unleashes waves of mean and snarky jokes).