I agree SYD - however I do think QF are trying quite hard to push business owners towards business rewards and the associated cards, which doesn't earn towards PC when transferring. I suspect points are sold to banks (etc) for consumers at a higher rate.
Many card PDSs have exclusions for business related expenses too. I realise these are hard to enforce for smaller businesses with less predictable / volume of purchasing, but points to the intention of the cards. And, many consumer cards have major points limits too, with earn rates plummeting after a certain monthly spend.
Basically, Woolworths, wine, and acquisition bonuses (Optus, if your listening, it's time for another 60k please) are the remaining golden geese and I agree it will be hard to hit PC+ without it.