(31)Digital content and digital services are often supplied online under contracts under which the consumer does not pay a price but provides personal data to the trader. Directive 2011/83/EU already applies to contracts for the supply of digital content which is not supplied on a tangible medium (i.e. supply of online digital content) regardless of whether the consumer pays a price in money or provides personal data. However, that Directive only applies to service contracts, including contracts for digital services, under which the consumer pays or undertakes to pay a price. Consequently, that Directive does not apply to contracts for digital services under which the consumer provides personal data to the trader without paying a price. Given their similarities and the interchangeability of paid digital services and digital services provided in exchange for personal data, they should be subject to the same rules under that Directive.