Their costs were $6000/mo
They earned about $5800/mo on patreon
Patreon takes 15% of that.
Its not like the developers were getting a fat paycheck every month. Most likely they were losing money the whole time.
4 years losing $1,000 monthly? Wow, that's an impressive commitment

. Come on, open your eyes. No one is running a charity hosting service on a loss for 4 years long, in their statement they say that without people's money they wouldn't have lasted more than 6 months. So let me stick to my assumption that they weren't losing money all this time; maybe they weren't getting rich either, I'll concede you that, but what they literally said on their note is that they can't keep paying servers because they can't receive their payouts, so I assume those payouts were more than enough to cover those costs. But my main point here is that they just didn't want to 'legalize' their situation in order to be able to find new ways of funding their service because they didn't want to go through all the scrutiny that comes along, that's all (and that's literally what they said in their note).
Considering what they have stated on that farewell announcement it was a borderline legal service, and they were finally hunted down once their income level crossed some supervision limit. This is just what happens when you want to play but don't observe the rules of the game. Anonimity is nice and all but there are reasons why legally established companies don't want to risk doing business with those people - where there's anonimity, there's no accountability, and where there's no accountability there are all kind of highly illegal business, and I'm not talking about incest games. Any payment processor out there will ask them to put some control to the content hosted, plus there's also that little thing called taxes and so on.
So I do believe they were doing OK on the financial side of things (at least they were covering their monthly expenses) but they just didn't want to go through all that hassle and as I said in other post I can understand that. All I'm saying is that there are viable alternatives to get the funds you need if you really want to keep the business running - of course that would have meant changing some aspects of that business, and that's why I understand their choice to not to do so and just close it down. I'll miss them as much as everybody else, but I don't think they'll ever come back unless they finally decide to go all pro, with all consequences. If they do, money won't be a problem -as it wasn't right now because they have all the support they needed.