Another reason not to trust Google. Adam Engst:
After 13 April 2018, new users won’t be able to create new links via the Google URL Shortener. Those who have used the Google URL Shortener previously will be able to continue to use it until 30 March 2019, so you have a year. After that date, your links will continue to redirect, but you won’t be able to see analytics or manage them in any way.
What’s next, Google?