It depends on what you're building and if you're trying to build a business, or just make a few bucks on the side. If you're trying to build a business, your decision to open source it should be in service of that goal. Is it a developer tool/library with a commercial offering that builds on top of it where open-sourcing it is your main marketing source? If so, then that can be a solid strategy. But if they are just regular tools you're building, then likely there are far better marketing strategies than using open-source.

And that is great to want to give back with open source. But if you're just starting out on your business, then that is a major distraction from the main task at hand.