Surely the only people saying that 'speedway at the Abbey was financially unviable' were Osborne (the stadium owner - who also ran the greyhounds) and the previous speedway promotion of Russell and Park.
Maybe there was some sort of financial incentive (brown envelope?) offered to Russell/Park to say that speedway was unviable at the Abbey. And surely it would only become 'unviable' because of the exorbitant rent and stadium costs charged to the speedway promotion by the owner (Osborne)?!
Pure supposition on my part of course....!😉
NB, Hasn't Rosco declared he would be in a position to front a new consortium with financial backing, for the Robins to continue at the Abbey - assuming of course that the running costs (stadium charges etc) were of an acceptable level?!