Looking at the token design of Fabric Protocol, I don't think supply is the only factor that makes it interesting. I actually believe the central issue is quite straightforward : is the token working inside the network?
As I understand, from the Fabric whitepaper, the model consists of three ... First, the emission of tokens is not constant. They fluctuate with the level of network usage and quality of service. There is even an example in the document of a 70% network utilization target, a quality target of 95%, and a 5% maximum token emission change allowed for each epoch (period) of the network.
Second, the increase in demand should come from real operations of the protocol, not mere trading. That implies work bonds, fee conversion, and governance locks. Fabric also states that the ideal target for a developed network is that 60% to 80% of token value is derived from structural utility and only the remaining from speculation.
Third, the system gives reward to verified contributions but later on, rewards based on activity will gradually be changed to those based on revenue.
Watching that unfold is the aspect I thought interesting. If mechanical labor packing creates demand, and outputs depend on proof rather than chatter, at least the economic layout starts to be reasonable.