There's still a middle man, by using reddit you are under their whims to censor/ban or manipulate whatever happens to work tasks there. It's also filtered in a lot of countries you'd want to include like China. I'd avoid it at all costs and pick something more decentralized. I wouldn't even trust a subreddit to be the discussion forum for a site I ran let alone be in charge of assigning work. Some kind of app for this instead, pref a free/GNU project, but with a highly abstracted overlay and UI for the common upwork freelancer to understand that doesn't rely on any Zucker/Reddit/Twitter cancer that will actively work against what you're trying to do.