I came across this news yesterday on Twitter, and being a very active user of okx exchange, I immediately reach out to their customer care to confirm if it's true, and behold, the customer care confirmed to me that it's true that they are leaving the Nigerian market beginning from August 30th.
It's a very unfortunate development for many of us, specially like myself because I personally love to use okx, if not for any thing, they are to me the exchange with the lowest withdrawal fees for most coins and tokens, there are times I usually send coins there just to switch the coin from it's initial blockchain to another, I withdraw using another blockchain and pay a very small withdrawal fee when other exchanges, including Binance are charging exorbitantly.
Anyways, i honestly do not blame them though, this present government have literally made it difficult for several businesses to do business with Nigerians, it's very painful to be honest.