DOC-382 add destinations

Author: markzegarelli

src/privacy/faq.md

@@ -55,6 +55,8 @@ In addition to your Raw Data destinations (Amazon S3 and Data Warehouses), we ca
 - Appcues
 - Vero
 - Google Analytics
+- Customer.io
+- Optimizely Full Stack
 
 Segment cannot guarantee that data is deleted from your Destinations. When you issue a user deletion request, Segment forwards the request to supported streaming Destinations. You must still contact these Destinations to confirm that they have executed the request.