Twitter:
To help build a more personal Twitter experience for you, we are collecting and occasionally updating the list of apps installed on your mobile device so we can deliver tailored content that you might be interested in. If you’re not interested in a tailored experience you can adjust your preferences at any time (read below). Additionally, if you have previously opted out of interest-based ads by turning on “Limit Ad Tracking” on your iOS device or by adjusting your Android device settings to “Opt out of interest-based ads,” we will not collect your apps unless you adjust your device settings.
Twitter is falling into the same trap that many other social networks have in the past — their need to make money outweighs anyone’s concerns about privacy and security. I’m going to cling to Tweetbot for as long as I possible can.