Hi Amir,
Thanks for interested in our product.
Our extension is 100% open source so don't worry about that.
About the 2nd request, our extension supports this function so don't worry about that.
You can do it by yourself or list all the things that you want to change so my dev team can do it for you as a customization service.
If you have any questions, don't hesitate to contact me via Skype for fast discussing: Vincent_4281
Regards,
Vincent

Thank you!
What happened to your demo video?
http://preview.cmsmart.net/demo/magento-call-for-price-extension

We fixed the demo so please check it once again.
Thank you so much for your feedback.
Regards,
VIncent

I tried your demo again and it seems there are few bugs.
1. Inside the product page the orice shows up although it shouldnt. I also couldnt find the click to call button (couldnt find also the add to basket button on other products...)
2. On mobile the popup is too wide. Tried to scroll but the popup stayed in fixe position while the background moved although it was greyed out

Hi Amir,
Thanks for your feedback.
We will try to fix it that problem right now.
So do you have any confuses with our problem? If yes, don't hesitate to contact me via Skype for fast discussing: Vincent_4281
Regards,
Vincent