Spammy backlinks on Q&A sites is a bad idea, as Google punishes unnatural links, so you could be harming your search ranking by engaging in such activity, and thus negatively affecting your site traffic.
There are lots of ways to drive traffic to a website - what works best depends on your audience but some of my key tips would be:
1. Have great content which a) keeps people coming back and b) that they want to share with others - make sure you update/add to it regularly
2. Invite people … Read more