If Calendly didn't include language in their Terms & Conditions that stated using the Calendly application requires users to give permission to listed third-party services like Heap to collect usage information, then shame on them.<p>But, wouldn't you know it, they aren't dummies:<p><a href="https://calendly.com/privacy" rel="nofollow noreferrer">https://calendly.com/privacy</a><p><pre><code> > Information Collected Automatically From You.
>
> [...]
>
> Third-Party Tools.
> We may disclose information to third parties or allow third parties to directly collect information using these technologies on our Website, such as social media companies, advertising networks, companies that provide analytics including ad tracking and reporting, security providers, and others that help us operate our business and Website. We use such third-party tools subject to your consent, opt-out preferences, or other appropriate legal basis where legally required. [...]
</code></pre>
So, yeah, if you use Calendly, you accept their terms of use and their privacy policy has informed users of such third-party collection of data, so there's the informed consent by accepting these terms.<p>IANAL, but if this class action doesn't get thrown out, it will have a serious chilling effect on any company that has users in California.