I don’t think 10-15% has been considered a reasonable tip for “above and beyond” since the 80s. Most will take that as an insult worse than not tipping, funnily enough.
As for pre-tips, they (intentionally?) design the checkout process such that if there’s a pre-tip, there is no post-tip. It’s basically a “don’t spit in my burger” fee.
I don’t think 10-15% has been considered a reasonable tip for “above and beyond” since the 80s. Most will take that as an insult worse than not tipping, funnily enough.
As for pre-tips, they (intentionally?) design the checkout process such that if there’s a pre-tip, there is no post-tip. It’s basically a “don’t spit in my burger” fee.