Since ZDAs require Zcash to operate the primary idea behind a higher fee schedule for ZDAs is the more ZDAs “consume” Zcash to operate then it’s better for Zcash holders because higher ZDA use generates higher demand for Zcash itself.
Plus it could also discourage the “free rider” problem. If the fee is higher then it could encourage a user to use Zcash instead of just issuing a new token on Zcash for the same fees.
The UX is handled by the wallets. Any wallet that wants to support ZDAs will need to re-do thier user interface and backend anyway to display/trade/issue the ZDAs. Whether the fee is 0.00001 or 0.001 the UX for the user would probably not be a substantial difference.
I haven’t seen any data that more fees = higher selling pressure for any coin. When fees spike in Bitcoin or Ethereum does it negatively impact the price? Do miners sell more or the they hold more because they are getting higher fees? I personally haven’t seen that correlation but would be happy to see hard data in the subject.
Market price is a result of supply and demand. Demand is driven by innovation and increasing use cases for Zcash will probably have a greater impact on Zcash market rates than a marginally higher mining fee would.
Keep in mind the entire case for ZDAs hinges on two important concepts:
- Higher shielded usage of Zcash provides stronger privacy for all shielded users.
- More use of Zcash block space (for ZDAs) can benefit Zcash itself by creating more demand for Zcash coins.