In case you still visit reddit from time to time, here’s how the get rid of their ads (i.e. “Promoted” posts):

If you use Brave, right click anywhere in the page and select “Brave -> Manage custom filters”. If you use uBlock, click on the toolbar icon, then settings (gear icon), then go to the “My filters” tab.

Enter the following code:

www.reddit.com##[id^="t3_za\="]

Save and reload the page. Promoted posts should be gone now.