I've been ordering daily for about a year now and tip ~$5 (half cash, half on app) on a $30 (usually 10-14 items) order each day. Is this acceptable?

I have had two different shoppers buy me surprise items with their own money so I assume I am relatively liked in my zone as a customer.

First time was a gluten free/dairy free ice cream sandwich (those are like $4!!!) from a couple who both instacart shop, and I usually get the husband or wife once a week. I got the husband on my birthday and just sent him a message about how pumped I was I got him as a shopper on my birthday, because he is the best shopper in Milwaukee. Then the next day by chance, I got his wife as a shopper, and she was the one who brought me the ice cream sandwich and said it was from both of them.

Then the second time I have this middle aged mom type lady who shops for me usually once every two weeks. One time I wanted La Croix La Cola and they store didn't have any. When she delivered she inquired about it, what it tasted like, etc. Then like a month later she rolls up with my groceries, then says she has a surprise for me, and she saw La Croix La Cola at a store when I didn't have it on my order and she straight up just bought me a case as a gift.