If you do not purchase your delivery in a tipping culture and deliverers earn a living wage, e.g. Northern Europe, then don't tip.
If you purchase in a place where tipping is the convention (e.g US,
Brazil), then do the simple algebra and figure out the real cost. If you do not have the money to tip according to your regional convention, then do not make the purchase. Full stop.
If you purchase in a place where tipping is the convention (e.g US, Brazil), then do the simple algebra and figure out the real cost. If you do not have the money to tip according to your regional convention, then do not make the purchase. Full stop.