The supply deflation is currently negligble, only a few hundred coins per year. It really is there to be a stop limit on any inflation which affects perception. Inflation will be nonnegligible if and only if technology improves in p2p land and we achieve > 100tps, like bip109 tries to claim. At that point if usage picks up supply will scale with growth/usage.
The same reason miners dont game thesystem in bitcoin is the same reason they dont 51% attack the coin in syscoin. You can always hardfork and revert any bad transactions worsedcase. If you have these rulesin the protocol you remove the incentive to even try to game that variable.
Regarding oversupply being a primary prequisite to network effect, please provide facts to back your claim with an example because i dont see anything but bitcoin doing that.
Bitcoin has no degrees of freedom on which the pools can affect money supply, but you can see that people have indeed "burned" coins voluntarily just to feel the freedom of actually doing it. Also pools by establishing policy to affect money supply do not try to game the network for "fun and profit" because they have a stake in the network and dont want to kill it, but merely to adapt it to their perceived needs. It will not be a case of a bad transaction but or a hard fork. It will be a healthy thing for them to do.
If you provide them with a way to effect a change eventually they will do it even if it is costly or requires cooperation, why? because they can!.
Trust in your users to know what's best for them isn't that the liberal axiom?
The link of abundant supply and adoption rate is self evident I think, the other side of abundant supply is low price.
Examples
1. Pirated windows helped Ms establish market share
2. Facebook, google, etc all free services dominate
3. VHS vs BETAMAX
4. Netflix
Miners cannt change supply any more than mining more than they should, again its a consensus rule and i have to repeat myself but nodes will all validate the transactions, miners cant do it just for fun.
The only way pools can effect the supply is by creating a fork, its no diffrent than bitcoin. If you want tomread the code checkout my github and you can see whats really happening, it might help in your understanding on how this stuff works.