Archery Supplies - is not responsible for a peep that is fitted that damages a string. All peep sights can damage a string. Strings are not covered under warranty. When you fit a peep you need to check the edges of peep are rounded. you can round the edges using a light sand paper. You can tie a peep in to reduce the chances of the peep damaging the string.
When a peep is fitted to a string this is the area of the string which is under the most pressure so it does run a risk of damaging the string.