My understanding of how it works atm is the creator of an "asset" has it valued, uploaded and pays a commission which is burnt. They then get paid a reward in Dev (as do any supporters/stakers) when that asset is used.
The value of Dev is very much mostly speculation right now but in the future the valve of the assets backed by the protocol, the activities, usage of these assets and supply demand + reward of the coin to allow the backing of assets in line the the current inflation rate.
The Dev team are active and friendly on discord so may be able to provide you with better information