Even with solid organic growth it might be a good idea. You won't need to, but you'd be paying a relatively small amount to jump start the product. If word of mouth is bringing you in x% new customers per month (the way it tends to do) you'd rather start off getting that on 500 customers than 20. You'll achieve high market share quickly that way.
Obviously you may not want to scale that fast though.
Our services can be considered more consultation and customization around our core product and expertise at this point(integration of data and geospatial technologies). Although I would love to have 500 customers (a milestone I look forward to), our current team size (3 people) would make that hard and would probably result in my head spontaneously exploding!
We are however working diligently on a couple of utilities and technology that can be considered a single product/service and would allow us to scale quickly.
Obviously you may not want to scale that fast though.