Minimum Gas Price Parameter

Step #2 of https://build.scrt.network/validators-and-full-nodes/join-validator-mainnet.html recommends setting the minimum-gas-price parameter to 0.1uscrt and says that “this is the main parameter that affects your ROI, so you should adjust it with time.”

I don’t think I understand this. Would someone please explain how this parameter affects ROI, and why it should be adjusted over time? What would be the disadvantage of not setting the minimum-gas-price parameter, or setting it to zero?

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It does affect ROI, as this is the only parameter that node runners can control WRT to their fees (inflation is a bit harder to control).
Usually gateways to the network are nodes that operated by big players/validators (E.g. sentry nodes, wallet nodes, explorer nodes), and if they all reach to the conclusion that in order to break even they cannot accept txs with low fees, then they can set the minimum-gas-price to that number. Then most users will send a fee instead of setting up a local node.

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