Consumers may benefit from personalisation and recommendations in these marketplaces based on their data, but many are in the dark about how much personal information these companies collect and share for other purposes.
ACCC chair Gina Cass-Gottlieb said:
We believe consumers should be given more uae telemarketing database information about, and control over, how online marketplaces collect and use their data.
The report reiterates the ACCC’s earlier calls for amendments to the Australian Consumer Law to address unfair data terms and practices. It also points out that the government is considering proposals for major changes to privacy law.
However, none of these proposals is likely to come into effect in the near future. In the meantime, we should also consider whether practices such as obtaining information about users from third-party data brokers are fully compliant with existing privacy law.
Why did the ACCC examine online marketplaces?
The ACCC examined competition and consumer issues associated with “general online retail marketplaces” as part of its five-year Digital Platform Services Inquiry.
These marketplaces facilitate transactions between third-party sellers and consumers on a common platform. They do not include retailers that don’t operate marketplaces, such as Kmart, or platforms such as Gumtree that carry classified ads but don’t allow transactions.

The ACCC report focuses on the four largest online marketplaces in Australia: Amazon Australia, Catch, eBay Australia and Kogan. In 2020–21, these four carried sales totalling $8.4 billion.
According to the report, eBay has the largest sales of these companies. Amazon Australia is the second-largest and the fastest-growing, with an 87% increase in sales over the past two years.
The ACCC examined:
the state of competition in the relevant markets
issues facing sellers who depend on selling their products through these marketplaces
consumer issues including concerns about personal information collection, use and sharing.