There is no sustainable way to monetize an open source project, except to offer a "premium" service (which, unless you are comparable to Redhat by market cap will probably unprofitable - I think Orable is losing money on MySQL) or you offer closed source "enterprises" version, like so many do, but it must be an exceptional tool, like nginx, varnish or nessus.

So I am very sceptical about monetization of community-driven momentum (the moment you close the code it begins to stagnate and die). Unless you are leader in your niche the chances for earning living from a project are close to zero.

Wordpress or other themes is a different kind of offer.