From the Winapp2.ini site (numbering added by me):
1. Winapp2.com is the official website of Winapp2.ini, an addon for CCleaner, System Ninja, and
2. This website and its files are not endorsed or supported in any way by Piriform. They take no responsibility for any damages or problems that arise from its use.
3. Many entries from Winapp2.ini have been included in the official builds of CCleaner over time.
Looks like the " CCleaner data" the email is referring to is actually Winapp2 data included into CCleaner.
"Intelligence without character is a dangerous thing." -- G. Steinem