Loyalty points

I have about £30 worth of Boots points. This would keep me in hair dye for a year. Yet what do I do when I need dye to cover the grey? I pay for dye with actual money. Why am I saving these points? They won't gain interest (unlike real money). The last time I saved them up I kept thinking that I'd buy myself a treat but I ended up using them to buy a present for someone else.

Time to save few pennies and get to Boots with my Advantage card rather than my Switch card.