Open and honest communication. Just say that you're not interested in the game.
If the host gets passive-aggressive you could try to talk civilised about that. In case they don't show the necessary understanding or are difficult to talk to, they might not be the kind of acquaintance you would like to keep.
While that would indeed be awesome, that's not the route they proposed. It's more about slowing down the perception of time, rather than being able to actually do something peoductive during that.
Despite thinking, "wow that's a disgusting way to see and treat humans", and some obvious moral concerns (like, social isolation for what feels like 1000 years, which will fuck up most people badly), which make this feel like a black mirror episode, the mind-upload issue is technically extremely tricky. Even if we had the technology to "upload" the human mind, it will be a copy, a clone, not you individually. And if we don't have an option to download the copy back into your brain, it will just be a waste of energy.
More importantly, an intriguing question is raised: After such a download, will this be you? Or just a copy of a copy and thereby another being which just replaces another one.
Another thing I find important to ask here: what's the point of penalties? These suggestions seem to me like psychological torture rather than measures to "correct" social behaviour. In no way resocialisation seems to matter here. So we just fuck people up by that and unleash them onto society afterwards. Doesn't sound good to me.
Sorry for not keeping my reply focused on your idea. I had some time to spare and this kept me busy.