I probably wouldn't have minded if I got one or two reminders a week or two before my license expired. But as I stated these annoying popups and emails started with 8 weeks remaining and I have been getting them every week since so I would disagree that it's an infrequent notice. In my opinion piriform is spamming my desktop and email inbox and so I've decided not to renew and to let my ccleaner license expire. Tell your marketing team that their compromise cost them a paying customer.