patreon can come after you even if you don't link to the game on your patreon
"Because you are raising funds on Patreon, we may be held accountable for what you do with those funds, so we may also look at what you do with your membership off our platform. As a result when we talk about “On Patreon,” it means the creations you are funding on and through Patreon. When reviewing a page, we look at how creations are shared, where the page is linked to and where the traffic comes from. "
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yes, what you propose could work reasonably well, but you're trading less risk for less money no matter how you try to swing it. i don't think it will be a popular way of doing it. if someone is that concerned about getting the boot from patreon, i suggest they stick to their rules or go to subscribestar.