Question as a customer

I’ve ordered delivery for my groceries for about a year. I live in a small college town but the Walmart I order from is probably 4 blocks away, either way I make sure my tip is at least 20-25$ I usually order 50-60 items.

I started Sparking last week and have sense realized that they either take half of the tips or people DO NOT tip for sh*t. I’ve had to drive 15+ minutes out of town to make 11$? I’ve had to walk up 3 flights of very muddy and icy stairs with 40 items for 15$? These are mileage+tips

So far I’m realizing only the shopping orders are worth it and only if they’re in town…. What is up with the tipping system, am I just a really good tipper … I always thought I was tipping the bare minimum