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James ChenPortfolio by TerraScale
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James Chen

Media Buyer · Tracking & Campaign Operations

I buy third-party traffic, investigate tracking discrepancies, and turn campaign evidence into the next test.

APAC campaign experience, including iGaming.
RedTrack S2S. Creative and landing-page testing.

Also known as Chen YimingBased in Taiwan · UTC+8Working language: English
James Chen
The person behind TerraScaleCampaign execution, measurement and iteration.

Look at the work.
Then the reasoning.

An ongoing operations project, a tracking investigation and campaign decision methods. Each explains the work, evidence and limits.

Real project in progress · Overall shadow mode

Worker-first campaign operations

Rules, tracking signals and human approval

How I defined execution ownership and spending boundaries in a Claude-assisted project. Limited actions are live; most optimization remains a proposal.

Read the project

Real case · Source details pending

Philippines deposit CPA

A historical result reported by James.

What the event means, what the numbers support, and what still needs checking.

Read the case

Illustrative reconstruction · Method demonstration

Tracing an S2S discrepancy

RedTrack / Postbacks / Event reconciliation

Follow the event from click to report, and separate a tracking problem from a performance problem.

Explore the method

Hypothetical plan · Method demonstration

Placement, creative, lander

Campaign decisions / Comparison design

Choose what to change next, what to hold steady, and when to stop scaling.

View the decision process

From a traffic source
to a defensible decision.

My focus is the practical connection between buying traffic, understanding events and choosing the next test.

Buy and review

Source selection, placement reviews, bids and pacing across third-party networks, including specialist adult traffic networks.

Trace and reconcile

RedTrack S2S workflows, click identifiers and event definitions. Understand what a conversion actually represents before comparing CPA.

Test and document

Links, creative and landing pages. Define the comparison, record what changed and keep uncertain conclusions visible.

Looking for a hands-on Media Buyer?

Share the role, the team and where the work happens.

Discuss a role