Whether "they" tell us or not, it will be apparent from the code, which people will look at before they run it.  People will see that you can't add to the balance once it has been locked.  The total can't be changed.  You aren't handing your coins to the custody of a third party where they can alter the balance.  And no, someone can't just "add an update that allows fractional reserves", because the code that governs the network is set in the client and users wouldn't update their client if the new code allowed fractional reserve.  Enough with the conspiracy theories.  It's clear from your posts that you haven't read a single thing about it.  You're only proving my point that the anti-blockstream hardliners are no better than anti-blocksize-adjustment hardliners.