If that's your objection, I have great news for you. They are proven to work, there's already scientific research in the case of Russia and Ukraine. You can't be bothered to inform yourself so I won't be bothered to search for a reference.
1 ruble is about 1cent lol
Like I said, I'm not sharing anything because you've already made up your mind. Ive skimmed your comment history and you're one of those "america bad" committed ideologies. Sorry, there's nothing I can do for you.
Was last you checked a little over a year ago, by any chance?
Because more recently, that doesn't seem to be true.
You represent this ratio as 0.011 vs 0.013 to pretend it's a small difference, when in reality it's a 15% difference which is huge in forex. You're just fundamentally dishonest.