and social capital rather than software features or licensing per se. It can provide recurring revenue if done well. Most popular version is usually freemium model, where you have access to basic community + paid "inner circle" features. a good example is the FSF, despite being a non-profit organization. You have free access to their IRC, but the forum requires a membership fee. It also offer perks like their XMPP server, discounts on purchases etc.

Selling code once

Bounty driven development

The users of a particular

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