There is no such thing - data is saved to your windows registry. Use the save code and then play the content that is considered new after that save. Full save complete.
Non-con is not gray area. Non-con is specifically against Patreon guidelines.
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And it's been that way for many years (since before 2018, anyway, when the first major crackdown by Patreon was made on adult game developers). From the oldest archived Patreon Guidelines page on the Wayback Machine (Apr 2019):
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Either the games you know of have not been reported or the games haven't piqued Patreon's interest to check the content, yet. There may also be cases where developers have had conversations with Patreon about content and how they can get as close as possible without crossing that line.
I would lean toward someone reported Uberpie (because Patreon isn't great on spot-checking). Most likely it was a disgruntled patron who was tired of waiting for Uberpie to release an update or not releasing content that they wanted or was tired of Uberpie focusing on certain characters or because it was a Wednesday (in other words, for no logical reason).