I've not seen the Tweets/Snaps that you send and haven't really seen how you market yourself so can't really speak to your situation specifically, but in general, I think the difference between a domme berating her members for not tipping them enough and blaming them for not having enough money to pay their bills, and a more vanilla model doing the same thing, is the transparency (or lack thereof).
If I'm following a model on Twitter who markets herself as a domme, who is very transparent about the fact that they are assuming the character of someone who looks down on their members, views their members as wallets, and expects their members to pay their bills, keep them in fancy shoes, etc. then it's to be expected that if their members haven't tipped them enough to pay their bills that month, then the angry, entitled Tweets will fly. Everybody involved knows the drill. Those who are in to that kind of thing will respond accordingly, and those who aren't will know that this is just the model's shtick and know that those Tweets aren't meant for them. No harm done. I don't think it's manipulative in this instance because nobody is being tricked. There's no deceit, ya know?
Unless I've completely misread and misinterpreted what it is you (and other models like you) do though, you don't have that transparency. By publicly crying forced tears and lashing out at your members because you haven't earned enough money that month to cover your bills, you're emotionally manipulating members who might not realise that this is just a money-making ploy for you, members who might then make financial sacrifices to help you, not because they enjoy being taken advantage of by an attractive woman, but because they genuinely don't know they're being taken advantage of. And I think therein lies the difference between what you do, and what a domme does, at least on an ethical level.