Forza Motorsport 6 update adds real-money microtransactions

The latest update for Forza 6 has re-introduced "Tokens", a form of in-game currency that can be purchased with real world money

Forza Motorsport 6 review: The new raining champion

Forza Horizon - Token system explained (micro transactions)

Forza Horizon 2 won't have microtransactions at launch - Polygon

Forza Motorsport 7 review - Drive

Forza Motorsport 6 Money Guide

Forza Motorsport 6's “Mod” System Detailed – GTPlanet

Forza Motorsport 5 — a long time fan's review

Forza Motorsport 6: Six fixes it needs under the hood

Forza Horizon 5 is getting more cars, content, and DLC

Forza Motorsport Developer Update Hints At Post-Launch DLC Plans