Can we track a button click instead of a page load?
We can create a pixel that your dev team can set to fire when the button has been clicked. They would just need to take the JS that is in the pixel and run it on button click.
Would you recommend we track with a sitewide pixel?
It depends on your marketing goals and where you believe visitors will land based upon the creative + search engine results. Either way, we could absolutely send over a sitewide pixel for you to implement as a catch-all of sorts.
Can we pass back revenue in the pixel?
Yes, we were able to add a custom pass back value so that your dev team can setup logic to pass back revenue on that fire.
Is there an HTML-only alternative?
Through barometric you can download either script tags or img tags. Img tags don't require a javascript component to run directly from their website. It loads a clear image somewhere in the code and that image src calls the pixel code.
Can you fire the script tags only for traffic coming from certain channels (e.g. branded paid search visits or branded SEO) or include the channel in the event that is fired?
During the pixel fire we are able to add a custom value to the pixel tag that can track things. We should be firing tags on all page loads but can pass back values in this custom field to be able to segment things like traffic source and referrers if needed. Your dev team will have to add custom code on pixel fire to pass this custom value to the pixel tag