"To the request to name a single brand based on personalisation, music brands like Pandora and Spotify are built on personalisation."
As I read this article, this meaning of "personalisation" is not the one used by the authors.
Tech companies like Spotify and Pandora are just intermediaries. They may help to "deliver" commercial product, or advertising, however they do not create the product referred to in this article. The article uses the term "personalised creative" to refer to product. Tech companies operate as middlemen and produce no content. They are dependent on others to produce it. This is the bait for computer users. Tech companies sell advertising services to companies that produce content.
Tech companies gather data about individual computer users, e.g., web browsing histories. This is "personal" data. Tech companies allege this makes it especially effective and therefore valuable. The studies cited in the article suggest this is claim is false.
Disney produces content. There is no shortage of personal data being collected and sold by tech companies which is available to Disney. The article highlights that, despite the availability of personal data collected by tech companies, Disney generally does not produce "personalised creative".
In sum, the article is not about what "tech" companies do, it is about what content producers do. More specifically, it is about whether, based on available research, producers of creative should or should not attempt to use personal data about computer users collected by third parties in order to produce "personalised creative".