Seeking Reddit-focused social media copywriter to promote new website via organic traffic

We have a neat new website and would like to focus on a Reddit audience for spreading the word. We need help planning, writing, and submitting Reddit posts and comments to drive organic traffic from a variety of communities. If hired, you will identify communities/subreddits that may be interested in our service and conceive of the most effective way to place mentions/links to our website in high-ranked comments or posts. Using your existing account or a new account, you will seek to spread the word in whichever subs are most interested/receptive. This is our first experience with freelancer, so this is a pilot project; if it's successful, we'll purchase additional work. The listed budget and timeframe are flexible, depending on results. Please propose a payment scheme; we would like compensation to be based on the number of high-ranked posts/comments, with bonuses for posts at the top of a subreddit/comment thread. We are also open to alternative schemes.