I saw this in Secure Shopping EULA:

Any communications sent to Comodo are the property of Comodo or its affiliates. Unless stated otherwise herein, submissions are not considered confidential, and Comodo is not liable for any use or disclosure of a submission. Except as noted herein, Comodo is entitled to unrestricted use of any submissions for any purpose whatsoever without compensation to the provider of the submission.

A bit worrying, don’t you think?

The EULA actually is quite old. It has been discussed here several years ago. Comodo has not done anything out of the ordinary with the data it gathers. I am not worrying but others may feel different about it.