Sin blocked the natural stream of thankfulness and gratitude. Certainly we would be very harsh if we were to guess that was the case with all of them. So, we must assume that some of them were not on such errands at all. Some of them may have been ungrateful simply because they chose the good instead of the best. It's a choice we all often make.
Nobody can argue with a concern for business.
Perhaps there were employees who depended upon the success of his business for their own welfare. Perhaps if his business failed, there would be children who would go hungry or be homeless. He chose something good. He might have chosen something better. I've not felt his handshake for a decade.