From what I know about Unity they have three different revenue sources. This is how they categorized them in their last earnings press release.
Create Solutions: $72.4 million
Operate Solutions: $182.9 million
Strategic Partnerships and Other revenue: 18.3 million.
https://investors.unity.com/news/news-details/2021/Unity-Ann…
Operate Solutions, the largest of the three is their advertising business according to this article.
https://mywallst.com/blog/unity-stock-business-model-breakdo…
This means they have some exposure. Advertising is over half of their business. But exactly what kind, I don’t know. The note you quoted says they are moving to a contextual model. This means ads will be targeted based on the placement or context, not the app ID or user. But can they successfully move everything to this new system? They may? Or may not? It’s unknown to outside investors.
For me, I am in a holding pattern on all of these stocks until it becomes clear that they can successfully pivot, and will wait until the next ER to see what happens. Given there are so many other great investments I will put my money into stocks that I have more confidence in.