This may prompt customers to resume their shopping again. Even so, this can be tricky. The company may want to provide some discounts that will serve as compensation for the disrupted shopping session.
Some of these customers may have already purchased similar products elsewhere so they will not be interested anymore in what they were trying to buy before the website had issues. If there would be discounts and some coupons given, this will make the customers more willing to return to their shopping carts and continue purchasing. It will be beneficial if this incident will not happen again.