I used the basic reddit promoted post interface. For bigger campaigns, it'd be possible to get in contact with one of their ads managers. The banner and catchphrase looked a little bit like so:

And the rarget audience was various crypto and investment-centric subreddits. For future campaings with different target audiences, catchphrase and logo can be adjusted to optimal conditions! Advertising is part art and part science, so it'll be cool to find out the optimum niches and payouts :)