Worth it really depends on your job. The Qlik Data Integration Certification mainly helps people who work hands-on with Qlik Replicate or Qlik Compose, since it tests real things like pipelines, replication, and live data movement, not just general theory.
Like most vendor certifications, this one counts more in companies already using Qlik heavily. If your team runs Replicate or Compose, it shows you know the tools and can help you move into data integration or architect roles. Outside that, it won't carry much weight on its own.
CertBoosters has a breakdown of this certification path, covering career options, pay range, demand, and preparation material for Qlik Replicate, useful if you're still deciding. Check it here: https://www.certboosters.com/qlik/path/qlik-data-integration