PredictIt uses RealClearPolitics as sources for their polls. and CBPolling is not listed on RCP. So to argue that CBPolling is being used to manipulate PredictIt markets is an argument with no backing.
This is just a ridiculous statement. You are saying they do 10-15 polls everytime and cherry pick the one they want? Lets see what they had for Virginia and Alabama Senate.
For Virginia, they had a virtual tie and for AL they had a slight lead for Jones. Both those polls are inline with results of mainstream pollsters. Quinnipiac had race tied in Virginia and Jones was leading slightly in Monmouth in Alabama. So your argument of poll cherry picking is an argument proven wrong by those 2 results.
At this point, you are just clutching to straws trying to find some minor thing somewhere to discredit them