I'm afraid this passage is open to misreading. In fact, 'directa ou indirecta(mente)' does not modify 'causa' but rather 'perda ou despesa'. The phrase "whatever the cause, directly or indirectly" is not used in legal language in English (in fact, if you Google it you will not find an example in any sort of text). On the other hand, what is extremely common is phrases of the type: "loss or damage whether direct or indirect".

What this means, in these sorts of boilerplate texts, is that the company in question is disclaiming any liability for losses, damages, or expenses... let's take the first passage below. An example of 'direct loss or damage' would be that the user's computer was infected by a virus and damaged. An example of 'indirect loss or damage' would be that the user made a business decision based on something in the website, which cost the user money, for instance, led to his/her losing a contract. In either case, the company that owns the website is disclaiming liability.

www.mathyspaints.eu/en/disclaimer‎ : "... temporary (un)availability of the website or for any form of loss or damage, whether direct or indirect, which may arise from access to or the use of the website."

https://www.lexisnexis.com/tolley/library/auth/displayTnC?.....‎ : "LexisNexis : These factors include tax planning, employment and labor considerations, ..... THEY BE LIABLE FOR ANY DAMAGES, WHETHER DIRECT OR INDIRECT, ..."

www.hernic.co.za/index.php?page=disclaimer‎ : Hernic shall not be liable for any direct, indirect, incidental or consequential damages, ... messages sent by users to the Hernic website owner for whatever reason. ... loss or damage whether direct or indirect or consequential, however caused, ..."

www.sdcbc.org/terms-conditions.html‎ : "... liability, damage (whether direct, indirect or consequential) and/or expense..."