Instacart has the 5% tip built in - it's automatic and can't opt out of it. You can leave more but I've tried to do that and they make it almost impossible - so the strike is probably a good idea - it should be at least 10% of the total order with an easy to choose option to add on to it if you're happy. But that's not what these boys were talking about - they were talking about curbside pick-up - and they're telling me that in their city the servers can get stiffed and I don't get it, frankly and, as always, ask for proof, the name of a service or restaurant where I can see this, which they conveniently NEVER provide.