Some re-hashing of old advice:
URL Shorteners.
Don't use them, don't click on shortened links.
Yeah, thy can get you under that 500 character limit... but at what cost?
They can be used malevolently: a writeup espousing something great, but a link to a nefarious site ready to install a bitcoin miner on your system.
And don't use them, because we don't know that they aren't malicious, and won't click on them.
@Helical_Code - you can add "/nosanitize" to the post to allow querystring parameters.
That was a change that J made to help limit tracking information on the site.
@0x56 Thanks so much! I will try this out.