Remember that you have to disable the Ad Blockers to see the destination page.
Some Virus Guards may give you a warning message of "Threat Blocked" especially if you have enabled an Ad-blocker.
This is normal practice of Virus Guards to show that they give you the maximum protection.
Sometimes they will request you to "Upgrade to a Paid Premium Plan" too. This totally their marketing efforts.
However please note that highly reputable URL Shorteners like Adf.ly never use advertising links that may harm your computer or privacy. Otherwise they wouldn't have been existing for more than a decade.
