Thread:Sannse/@comment-29387918-20160801170240/@comment-8-20160802163834

The most common way to get new contributors is via search engines. So the best way to start attracting people to the community is to write plenty of good contact that Google etc. will find.

It's also possible to talk about your community on forums related to your topic. As you say, you shouldn't spam, but some allow a little promotion of useful resources.

There's more advice on Help:Building a community

Good luck!