Ask HN: Paid app but also want to open source?

I've just written my first small paid application and would also like to release the source code publicly on github as a few people have expressed interest.

There's some pros and cons I can see with it:

Cons:

- Potential revenue loss, people wont pay if they can get it for free.

Pros:

- Giving back to community.

- Potential free advertising when technical users use the free code and non-technical users catch wind and pay for not having to be bothered with code.

Anyone do both and can share experiences?