Prinnovation, or PR + innovation, is innovation for the sake of PR only.
This could be minor often spurious or unnecessary variations on product features such as electric mechanised room smell dispensers for the slovenly.
Or unwanted services like nuisance “customer service” calls which are nothing more than intrusive touts, and hotels that put those weird “this toilet has been sanitized for your enjoyment” sashes around their toilets.
(Yes yes I realise it could also mean innovation in the field of PR. But I shall bite my tongue…)