Who understood or from the experience of past forks: if I borrow USD (not bitcoins) and buy bitcoins before fork will I receive b2x tokens?
I read this statement
https://www.bitfinex.com/posts/223 but it is clearly only about the borrowing of bitcoins.
If you borrow USD to buy Bitcoins then at the time of the fork you will own those Bitcoins and therefore get the B2X tokens.
From the statement you linked to:
Specifically, in the case of a hard fork event, lenders will receive both BTC and B2X. Anyone that is short BTC/USD or long any BTC trading pair (ETH/BTC, LTC/BTC, etc.) will owe B2X to the lender, effectively making the user short B2X. An exception is being made where BTC is borrowed but is not in use as financing collateral. In that case, B2X will accrue to the lender. Users that are financed long BTC/USD or short any BTC trading pair will receive B2X.
I bolded the bit that confirms that. If you buy BTC in a trade then you are long BTC in trading parlance.
The only situation that it works the other way round is where someone borrows BTC, in this case, the B2x belongs to the lender.
Thank you for the answer, but I'm not a native english speaker. Are you sure that