Paying won't guarantee you the soft you pay for won't switch business model for subscription, or sell to a bigger company that will extinguish it.
(The dichotomy between "I must earn a gazillion dollars because I'm a senior dev" and "I will not pay money (that pays those salaries) for software" that's so prevalent on HN is mind boggling)
And there are significantly more projects that have stagnated and disappeared than those that survived.