In a discussion titled “Hosting questions,” user Carlos_Andres asks about using the platform on a main domain (myweb.com) instead of a subdomain, migrating from one VPS to another, and selling plugins unlocked by purchases. pfaffman confirms that the main domain can be used (though www is preferred), migration is possible via backup and restore, and points to Discourse Subscriptions for plugin sales. Carlos_Andres requests a tutorial for migration, to which HAWK advises researching first. Carlos_Andres mentions an installation error, and NateDhaliwal asks for details on the error.
I have several questions, can someone please answer me?
1- Can I use it on the main domain, myweb.com, and not on a subdomain?
2- Can I migrate from one VPS to another?
3- Are there any plugins that I can sell within the system that are unlocked when I buy something?
I look forward to your response.
Yes, but it’s better for several reasons to use www than the main domain. To the user looking at the url in their browser the bare domain and www look the same
Yes. Backup on the old one and restore on the new one.
You can use Discourse Subscriptions
Any tutorial?
Search is your friend here. If you come up blank, let us know what the gaps are but you need to do your homework first. 
I was installing it and it gave me an error
Could you share the error?