If you look at the tokenomics part of the Whitepaper you’ll see the plan to automatically burn is there when the ‘Network Node Reserve’ fills up.
There’s a good diagram near the end of the Whitepaper that shows this concept in the flow of tokens around the network.
Whether the reserve ever fills up remains to be seen based on upload rate consistency and how the node reserve smart contract is set up.
Further commentary on the node reserve now I’m thinking about it:
If the reserve does fill up, then 98% of payments from uploads will go to nodes + 2% burn, vs 82% to node operators, 18% to reserve, and no burn when the reserve is filling (but 18% being taken out of circulation short / medium term).
It’d be good to hear more details about plans for this from the team in due course.
If the reserve fills, the network would likely be in a good balance, but then node rewards will suddenly jump 16% (if I understand correctly), incentivising more to join, and putting downward pressure on token price, despite being in balance previously.
I wonder what will then happen if the network switches from full reserve + burning, to reserve paying out & refilling… will payouts to nodes from the reserve be greater than / equal to the 16% drop in payouts to nodes from uploaders be enough to incentivise nodes to remain, and will the support level taper down if the reserve diminishes, or abruptly finish once reserve is empty?
I like the 2% of payments burn idea, but the potential dynamics of the reserve make me nervous… more explanation of how it’ll operate may help calm my nerves 
An equal rate for reserve filling & burning (e.g. 5% of payments to nodes) would avoid the potentially risky stepping up / down payments to nodes based on reserve status, and reduce the risk of any negative feedback loops being triggered by these potentially abrupt shifts in incentives.
Another possible tweak is that the reserve could be full from day 1 (using 50% of emissions supply
), and the smart contract worked on to ensure smooth operation / minimising distorting effects when the reserve switches between full / paying out / filling modes.
Burning will put upward pressure on token price over time due to decreasing supply, but what happens to the token price will depend on the market in aggregate, as price isn’t controlled centrally.