Is there an existing issue for this?

• I have checked for existing issues https://github.com/getsentry/sentry-javascript/issues
• I have reviewed the documentation https://docs.sentry.io/
• I am using the latest SDK release https://github.com/getsentry/sentry-javascript/releases

How do you use Sentry?

Sentry Saas (sentry.io)

Which SDK are you using?

@sentry/react

SDK Version

9.28.1

Framework Version

18.3.0

Link to Sentry event

No response

Reproduction Example/SDK Setup

Sentry.init({
   ...
    tracesSampler(_) {
      return getCurrentSamplingRate(); // Reads global variable, updated when user data is initialized. We want to only record the paid users
    },
   ...
})

Steps to Reproduce

1. Initialised Sentry with tracesSampler
2. Added samplingRate as custom attribute
3. Observed that transactions with sampling Rate 0 are reported in Sentry

Expected Result

Transactions with sampling Rate 0 should be dropped

Actual Result

Transactions with sampling Rate 0 are getting reported to Sentry