It was FRK who went foraging there and SJ & Snorts decided to tag along. It was SJ who wanted content for her vlogs. I think they handled her intrusion quite graciously and showed her in their vlog only for 10 seconds, SJ made several episodes of them. SJ's advice was about the non-profit organization, Fleuries had a Patreon account already. They owe diddly squat to SJ. When people started to watch their mural video and liked it, the next logical video to watch is their tour of the chateau video which always has been their most watched. The algorithm started to suggest this video to a lot of people too which then went viral. Out of 1,5 million views only 40k subscribed, I don't think that's a phenomenal result. And like @Jikki2 already said their subs and views align. I don't know what is your definition of YT success but both SJ and Fleuries make a living out of it, they're not YT stars, that I agree of.@lolander I am not talking about their sudden success, I know a lot of people who have more views than they have from one video & they don't suddenly get 40,000 extra subs more than a year after that video was released & they don't use patreon. If they were so successful, why did they have to approach (& use) SJ for advice on how to get patrons? If it was SJ or someone else that got 40,000 subs in 3 months, some would be suspicious. The Fleuries finish projects but have not decreased their patrons or the money they need. Their success on patreon is because Anna is from UK. I have noticed that the only 2 successful people on patreon from their Chateau YT community are ladies from UK & most of their patrons sre from US some of them ike the UK accent (the posher the better) e.g Lisa Vanderpump a US fan favourite. Also I don't think the Fleuries are more talented or organised than the other chateau owners. They are finshing their projects but still want more patrons & money. I think they all manipulate the viewers for donations but 2 of them got lucky (on patreon), they are not really successful YTubers.
MPK gained 65k subs and SJ 35k on April last year. Are you suspicious of them too? There's always the element of luck in every viral video. What you do after that is what counts. MPK blew it, SJ's channel has stagnated, I hope the Fleuries will do better but it's too early to say. At least they're much more prepared and have a professional view to go forward with it.
About the Patreon and English ladies, I must remind you that Chateau YT community is English through and through, there are a lot of English chatelaines with 'posh' British accents who are not successful with their Patreon. Personally I'm not a fan of Patreon, if you have the money to buy a chateau, you should have the money to live in it and to restore it. If people want to donate $5-10 monthly for additional content, want to belong to a community/fandom and have a chance to communicate with the creators, fine, but anything more is delusional, you're still a stranger to them and it's nothing but a customer relationship even they 'invite you to a journey with them'. If you really want to save French heritage the French Heritage Society and many other societies are better value for your money and make a real impact.