Increase forum traffic for an established forum?

So i have a forum(xenforo) that's been online for around ~10 years, its doing ok, but i'd like to move up to the next step and just wondering hows best to increase traffic?

I've done some SEO, but still learning, if you search in google/bing/etc for "my niche forum", it is the top result, i have social media accounts (fb page and twitter) but only really use for auto posting from the forum, also its not really the type of audience where a monthly giveaway, or competition would really work.

 

You need to market on similar niche sites, we have seen clients purchase advertising spots on their competitors websites and get significant increase in traffic and sign ups. Also, use a CDN, so the performance of your forum drastically increases to everyone regardless of their geographic location and latency.

 

Have you looked at the potential?

How many people are actually searching for forums in that nice?

 

There are thousand of forum websites, but a webmaster always search for quick approval for instant back links so i know a source of Instant Approval Forum Submission Website, just sign up and post your your thread instantly.