Sorry, you can't be a "we turn you into radioactive ash" macho *and* try to sell stuff to the world at the same time...
I personally do believe Russian vaccine is genuine but you need to be totally detached from reality to believe haggling about Β±2 percentage points is the way to win the markets.
Putin and his whole entourage is totally bipolar in this aspect.
@kravietz you also can't trust Russia to tell the truth about how effective their vaccine really is.