I work as much as possible using the free versions of scripts created by people dedicated to the OpenSource Concept. This keeps your costs down and offers near endless options.
A really smart person would define it thus: In production and development, open source as a development model promotes a universal access via a free license to a product’s design or blueprint, and universal redistribution of that design or blueprint, including subsequent improvements to it by anyone. From Wikipedia, the free encyclopedia
What this means to a website owner: Men and women all over the world who write code for the fun of it are constantly creating new tools, keeping current tools upgraded and ready to answer your call for something special when you need it. Test this theme and use it for free. If you really like it then send the creator $39 and they will turn on a few more features for you. Same with most all of the features you see on my demos.
This business model seems alien to most. In person I often hear comments about, “Nothing is free,” or, “If it sounds too good to be true it must be BS.” A person still needs to pay for the tools to be set up and hosted somewhere but in most cases. using them is free.