Best place for affiliate links into a subreddit

I'm growing some subreddits on my own and already found some relevant affiliate offert that could eventually fit in those, but I'm unsure about how/where to place them (I don't use the affiliate links directly but I do a Redirect 301 with a domain that I've bought just for that purpose).

I've seen some other subreddits that have a banner with a link to the affiliate offer in the "Info" section of the sub, as well as in the welcome message that is sent as soon as you join the subreddit, and I've thought about using some alt account of mine to comment under the most upvoted ones (that are in the "Trending" section of the sub) with the affiliate link because well I'm not gonna delete them as I'm the owner of the space, but I'm concerned about people reporting and making the domain blacklisted.
I already have one subreddit with 10k members in a NSFW niche, is it a good idea to put affiliate links in there?

Redirect to a landing page and not directly to an affiliate link and you will be ok.

You can add such words- "Sponsored" or "Support Us"
That way you may receive less reports.