Some of that makes no sense, Ken... the facts I mean not your sentiment.
I had a look at the rider app this morning... it's not possible to order a Wait & Save ride with the pay driver directly option, you must pay by card through the app.
If they are charging you an extra 10% commission that is not enough to give the rider 10% discount. On a €100 fare, for example, you would pay an extra €10.00 of which Free Now would realise a contribution of €8.13 (the extra you pay before VAT @ 23%) yet the rider would receive a discount of €10.00 before any applicable technology/surge fees.
In practice all fares are obviously offered at 25% commission inc. VAT first and the ones they can't cover at that rate are then, and only then, offered at 15% commission inc. VAT.