https://www.ycombinator.com/legal:
“Please note that we reserve the right to refuse to (i) delete any of the submissions, favorites, or comments you post on the Site or link in your profile or (ii) remove their association with your profile or username”
This conflicts with https://gdpr-info.eu/art-17-gdpr/:
“The data subject shall have the right to obtain from the controller the erasure of personal data concerning him or her without undue delay and the controller shall have the obligation to erase personal data without undue delay where one of the following grounds applies:”
There also is no export option, as required by https://gdpr-info.eu/art-20-gdpr/:
“The data subject shall have the right to receive the personal data concerning him or her, which he or she has provided to a controller, in a structured, commonly used and machine-readable format“