Wike has always had a way of churning out results, it favored PDP in 2015 and 2019, that was why Peter Obi was begging him to deliver Rivers State to him while Wike could take governorship.
Going by the turn of events at the PDP primaries, PDP with his G5 fell out with the leadership of his party and has remained at loggerheads with them. PDP even recently called him a coward. Perhaps that was why he decided to ceize part of the USD funds PDP brought into the state and decided to use it against them
I honestly thought that Wike would only try and ensure PDP does not win and maybe allow labor have an upper hand, but no one seems to know why he went all out to humiliate PDP and Labor. I am sure that even APC did not think that the Rivers result was possible.

Rivers State is a special case in this election but I insist that it is more from a position of vendetta of Wike against Atiku than any real interest in Tinubu, but why not just allow labor win is where I do not understand Wike's motive

Well, even with the BBC confirmation, it does not change the dynamics of what we already suspected