Apps on NEM sustainability

Hey people of NEM! I have maybe somewhat of a weird question. I’ve finally gotten the chance to go through some of the project proposals and all of them seem great. Most of them will utilise the messaging/appostiles and mosaics. What they’re doing makes sense but in terms of long term sustainability is the assumption that people who use these apps have an active amount of nem on hand that they can use to “power” these sorts of applications. Or the alternative I guess, is does the companies that create these apps provide a wallet that they themselves fund to push and complete actions on the block chain. I feel as this is the issue with block chain technology when you aim to use it in terms of a conventional database. Is there a model that people are using that makes this viable? I hope what I’ve written makes sense, thanks in advance guys/gals!

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good job~!

Check out catapult agregate trancsactions.
https://nem.io/catapult/