At the moment we are not looking into shared masternodes.
The way the x42 blockchain works it is very counter intuitive for us to get smaller virtual machines to host our masternodes, those won't contribute a lot to the network in general, so we are not looking for services like that at the moment.
But I got to admit I am not familiar with this particular service you linked.
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actually, I'm asking because there are a lot of services for the joint collection of master nodes. and if I don't have enough coins on the master node then I could share with others to run the node.
here is an example of how it works https://www.mnforall.com/
https://discord.gg/a22YhNf