Enforcement is inconsistent on several sites - being largely driven by third-party reporting and AI scans rather than the site spending money to filter themselves properly. A given project surviving so far is just evidence that it hasn't been noticed yet, not that it's actually acceptable. Or, in some cases, it's a sign of which manual reviewer it landed in front of (and possibly what mood they were in that day).
Also, in the case you mention, season 2 is not season 1, and the precise content of the two will differ - depending on precisely how the line is crossed, something in season 1 that isn't in season 2 may be the difference.
When it comes to Patreon, it's not a shop, and it's up to individuals to decide whether they want to support an individual creator, in the hopes of enabling them to produce more of what they like. Use it with that in mind, and you'll avoid a lot of disappointments.