Even if the link still works and provides a valid key, you are violating Microsoft’s software license agreement. Volume license keys (the ones commonly shared in such text files) are meant for businesses with an agreement with Microsoft. Using a VLK on a home PC is software piracy.
Bit.ly allows you to see the destination without clicking. Simply add a + sign to the end of any Bit.ly link.
the Windows activation request away from Microsoft’s official servers.