As you can see in my post above, an abbreviation, or acronym, is created by taking the first letter of each word and using it to create a shorter phrase. Examples include "National Football League" being shortened to "NFL", "National Aerospace and Space Administration" being shortened to "NASA" and many others. According to this pattern and definition of acronym, the proper, correct way to abbreviate "Season Vault Access" is "Season Vault Access", also known as "SVA". Removing a major name (Capitalized important word) from the phrase and using a random letter in the middle of one of the words is improper in the English language and factually incorrect.
Also admins agree it's SVA and SSV makes no sense and is just made up.