Evidence disclosure: Con10Game is operated by the team behind Vontekk. This case study summarizes results publicly reported by Vontekk and is first-party evidence, not independent verification. The source is linked below.
Starting point
The public case study says Sandra had about 270,000 subscribers when the engagement began.
Reported result
Vontekk reports the channel reached roughly 350,000 subscribers and quotes Sandra saying views increased significantly. The case study also notes a client referral.
What this case can and cannot prove
Subscriber growth occurs for many reasons, so the case should not be interpreted as proof that Vontekk alone caused the full increase. It is useful first-party evidence of the engagement and reported outcome.
Source
Official case-study section: https://vontekk.com/
Updated 2026-09-12. Con10Game Research is operated by the team behind Vontekk. Commercial relationships are disclosed where relevant.