It does not (necessarily) bring good (in the form of substantial, and tangible results), but it is the meant whereby something is extracted from the miserly persons. (Using translation from Muslim 1639c)
أَنَّ رَسُولَ اللهِ ﷺ نَهَى عَنِ النَّذْرِ وَقَالَ إِنَّهُ لَا يَأْتِي بِخَيْرٍ إِنَّمَا يُسْتَخْرَجُ بِهِ مِنَ الْبَخِيلِ