Was any reason ever given for them doing it? Did Binance do it at the request of the Pundi team or did they take unilateral action because that market was not productive?
It was foolish of them to de-list the BTC/NPXS pair... It's like invalidating BTC by doing so.
I think this is really came from the Binance because that time it was not only NPXS-BTC pairs which was delisted but it's with other projects trading pairs.
accordingly :
https://cointelegraph.com/news/binance-delists-trading-pairs-some-include-tokens-from-its-launchpadBinance claimed that the pairs were being removed to “improve liquidity and user trading experience,” and that the choice of trading pairs was “as requested by most project teams.”
Full list of pairs removed :
“ANKR/PAX, ANKR/TUSD, ANKR/USDC, BCPT/PAX, BCPT/TUSD, BCPT/USDC, BTT/BTC, DENT/BTC, DOGE/PAX, DOGE/USDC, ERD/PAX, ERD/USDC, FTM/PAX, FTM/TUSD, FUEL/ETH, GTO/PAX, GTO/TUSD, GTO/USDC, LUN/ETH, NCASH/BNB, NPXS/BTC, ONE/PAX, ONE/TUSD, PHB/PAX, PHB/USDC, TFUEL/PAX, TFUEL/TUSD, TFUEL/USDC, WAVES/PAX, WIN/BTC.”