But there is one more economical impact about masternodes that I want to mention and that is regarding Virtual Private Servers (VPS). You see, many masternodes are ran through a hot/cold wallet setup where the cold wallet that doesn't have to remain open and can be secured offline is setup locally to the user. Meanwhile, the hot wallet that is always on 24/7/365 is located remotely on some VPS. This usually means job creation because someone has to setup and maintain that VPS infrastructure.
This simultaneous hot/cold wallet MN solution is new to me. Could you elaborate a bit more? Is it so that the hot wallet on the VPS that just serves to reflect the funds that are safely stored offline? Or is it a completely different wallet that is somehow connected to the cold wallet? Can you give an example of a masternode coin that has implemented this solution?
Sure and yes, your summary is fine, "reflect the funds that are safely stored offline".
The hot/cold wallet allows you to have a proxy representation of your local/cold wallet assets (masternode collateral) via the hot wallet (VPS).
In other words, you can shut down your local windows/Linux wallet as you please or leave it open for staking only (if the coin supports POS). Meanwhile, the hot wallet (vps) is on a highly secure and high reliability server infrastructure that you can shop around for. On top of assuring a high-reliability connection to the coin network, it can also reduce the attack vector to your direct wallet. If someone were to attack your hot wallet (vps) it would merely be the equivalent of cyber-vandalism with very little actual damage done. It could result in an interruption to MN rewards but that's better than a focused attack on your local machine if the scenario of the local machine is to be left on constantly.
Most masternode setups are hot/cold wallet setups. It would be easier to list coin projects that haven't started with hot/cold setup support and I can only think of one: Binarium. But I wrote a guide to setup a hot/cold setup for Binarium.