Why isn't it FREE as 'Advertised'?
Are you upset that the add-on was 'advertised' as FREE and then you find out you need to pay for the full version? If so, we are upset too!!! Few people realize that the add-on developers don't have much control over the blue 'FREE' button which shows when you search for an add on.
As Google add-on developers we are limited with two options. Either have a price showing or the 'FREE' button. If we opt for showing a price, you are forced to buy the add-on just try it out!!! If you don't like it you would lose your money or have to go through the process of getting a refund. We don't believe this is in your interest to make you pay for something that you just want to try. Therefore, you'll notice that all Google Add-on developers will mark their add-on as free and then ask users to pay for the full-version later.
Nevertheless as soon as you install it, we inform the you - in bold and red letters - that this is a trial version. This way if you can't afford to pay you don't waste your time learning how to use the add-on.
We also hope you understand that it takes a lot of time and money to create and maintain the add-on. The license paid covers a fraction of the costs yet it can save you tons of time. We hope that you can support us in keeping the add-on up and running.