The other thing of note is that I only got a tip on one of those jobs. You'd think folk might be inclined to make up the difference where they can see the meter is higher but, for me anyway, that wasn't the case. The tip I got was from one of the fares that was lower than the meter but that's 1 out of 5 and 1 out of 10 in total i.e 10%.
My experience of Free Now Taxi Saver fares differs substantially in that regard with c.70% of those clients tipping and, in most of those cases, tipping more than the amount of the discount. What makes that more remarkable is the fact that the Taxi Saver clients aren't getting any more discount on top of that given by the driver whereas Uber clients typically get 30% discount off whatever fare the driver gets (before commission) be that calculated on the meter or not.