I advertised on reddit for our startup roughly one year ago and it was the worst ad management experience I have ever witnessed. For the size and age of reddit the advertiser backend was a real shame. The kind invoices they provide you is laughable, it feels like the whole backend was built by amateurs. On top of that, the traffic we received from reddit was very bad for our e-sports/gaming-related website.
p.s. If any engineers or PMs are interested in helping us build out a world class, high-scale ad platform please get in touch (email in profile). We are hiring for senior and above positions in NY and SF.