Something I've noticed as a customer
I used to drive for spark but haven't done any since they enlarged the delivery routes, because I'm rural and some offers are in towns 30 minutes away.
Anyway, I still use the Walmart app for deliveries because after doing spark I don't want to go to Walmart unless I'm getting paid.
But something I've noticed about tip-baiting. The tip is automatically selected for you- say 10% or whatever. You can edit to make custom amount or click a different percentage. I live very close to Walmart and don't so huge orders, so my tips are around $8-10 for 15 items or so. I will edit it, leave the page/submit order and come back to see the tip has reset to the percentage they selected for me. I sometimes have to edit it around 3 or 4 times before it sticks.
My point is: if you edited a tip and thought you were leaving $10 and then went about your business. Then saw your charge is more than what you initially selected, l could see people not realizing they are "tip-baiting." Because people are stupid and I'm not sure if you didn't know the way the offers are presented on the spark driver app.
I don't know. It's just been something I've noticed and it would make sense when the tip is like $21.54 and then edited to $5 even or something. I'm not saying it's right I'm just saying it's something I've noticed.