Yes but my entire point is that it just isn't comparable because of the insane scales we're talking about. For example, WhatsApp has 2 billion monthly active users. Let's say Signal had the same number and let's say it costs them 0.5$ per user per year (probably an underestimate). That's 1 billion dollars in yearly expenses. Wikipedia, which is one of the most successful donation based companies to my knowledge, has a yearly income of only 180 million $. I just don't see there being enough donation capacity in the general population to sustain that high of a figure.

GrapheneOS might be fine even with 2 bilion users with the same amount of funding as they have now, because their costs aren't tied to their userbase. But scaling Signal to the size we're talking about is an entirely different beast.