She was sincere though, in a way. She told you, repeatedly, from a start:
I don't agree with many things
@EasternPromis is saying, I find some of them to be downright insulting generalisations towards Slavic women, but she also has some good points and I do agree with her about the fact that it's pretty obvious that the model you've been talking to is not living the dream in Russia and has plenty of reasons to want to escape from there.
Looks like she wanted you, your money and your foreign passport to be her ticket out. Her
way to build a future. And it really doesn't look to me like she was hiding it, she was just putting it nicely with a romantic bow on top at first, because obviously "I will never love you, but give me money and take me away from my fucked up country and it's delusional, dangerous dictator and I, an attractive 25 yo, will give you companionship" was unlikely to work. I'm not blaming you for not noticing it at first, you caught feelings and wanted to believe she did too, but I do believe it should be clear to you by now 18 pages into this thread.
It also makes sense to me why she's so rude and blunt now. She feels she wasted a year trying to work towards her goal and it's pretty clear it's not gonna work out, because you finally starting noticing that her goal is different than yours, so she's trying to squeeze some last expensive gifts out of it.
I'm not saying what she did was okay or that the way she's talking to you right now isn't fucked up, but at the same time it's hard for me to judge her too harshly. And what would be the point anyway? The best thing you can do now OP, as been said many timed by many people in this thread before, is to just block her everywhere and move on.