If you understand this then you will see there is incentive to help other do. Developers produce the components in HW and SW that the end user can put together to their needs. Such HW and SW can range to a simple function to a more complete HW and SW package. From this you might see that the subscribing user might be seen as a developer or integrator. And why show he care, knowing he cannot possibly do so much in the time he has.
Income comes from subscription, sales of parts and integration of parts to add value.
Fair and equal to all. The annual subscription supports managing the plan and providing monthly information on what is available in the way of new parts and ways to use parts. But it's no free lunch because you know you have earned it in helping support those below you in the four demensions, via one on one and group help in HW and SW use and integration. Simply because, although you may have easy to use tools for integration, it doesn't mean that the complexity of the part is easy to understand and intergrate. But by the same side of the coin, the developer and integrator will have incentive to make it as easy as they can.