[siegel]

As an attorney who deals with responding to (and, well, also drafting) letters like this, I think LinkedIn may very well go away if you remove any reference to LinkedIn from your website and otherwise refrain from stating or implying that your tool can be used to scrape LinkedIn.

If you are ok with that, a carefully drafted response letter that shows that you take their concerns seriously and are taking steps to effect the above changes might end this. At a minimum, you'll be able to get clarity as to whether they want more that just stop referencing them.