Your question reveals that you have a lot to learn about how to promote your work.
First of all, sites like Reddit were created so that members could share outstanding web pages with each other. They don't like people who join just to push their own pages regardless of quality. On many of these sites, promoting your OWN work is against the terms of service and if you're caught, you can get banned.
Many people do post their own work on these sites, but you must post lots of other good quality articles and websites to camouflage what you're doing. That's a lot of work and it becomes debatable whether it's worth it.
Beginners post on bookmarking sites. More experienced online writers do other stuff - do some research and learn!