So here is the interesting thing. I am an ACTUAL user of this type of software and a paying SUBSCRIBER to two different SaaS call tracking platforms. I run a marketing agency and have almost 200 clients using call tracking on the twilio platform.

Firstly - thank you! What an awesome contribution to the community. I cant comment on code quality or license attribution but I can tell you that it is an extremely valuable service.

I have not downloaded and installed your code, but I will - here is where I see the market need these days, and its far greater than just source attribution.

Google has done a great thing by encrypting searches, but it is terrible for website owners and marketers because it is so difficult to prove ROI.

The place that we use using this successfully is by using the UTM source information of a click to change the incoming phone number on the site using dynamic number insertion - this helps clients have a justifiable ROI to continue to use the service.

If you have questions about how I am using this, please feel free to let me know - but kudos to you on building and open sourcing it.