Do you rent dedicated servers from hosts or do you use your own connection and your own server?
Does it cost you more than you earn or is it cheap?

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I do not use my own server. I go for a dedicated commercial servers. Previously i was using free servers. But i was not comfortable with their service. Then i went for paid server and am currently in a very good service which is very cheap and also offering the best service. I do not want to reveal the name of the service company as it would be an offence here. So my conclusion is that when you are commercial then go for a paid service.