Short answer: Affects all users, borked 3rd party DNS is not our issue.
Putting new entries to hosts file affects every user, and we have absolute no means whatsoever to verify these are correct. On top of that DNS resolution should work correctly to begin with, if 3rd party DNS (trackers) have their DNS borked so bad that they have to force users to make hosts entries, it is their problem not ours. They should consider another line of hobbies if they cannot maintain basic DNS correctly.
If you still insist you have to get a borked tracker to work: You will need either dedicated or VPS, there you will have "free reign" and can do what you want. However, we do not by default manage it for you. You have to be capable of taking care of a server yourself, including security. You can opt for our management package, and you will receive a service exactly like our regular rTorrent / ruTorrent seedbox offerings, no root access but customization is allowed at 3€ per administrative ticket pricing, including customized hosts file.
Without management every task we do for your server is 3€ per issue/task as an administrative ticket.