I'm really looking around on the Magix site and I'm in an endless loop for where I can upgrade Vegas Pro 13 to 14. I am within a year from purchasing 13, so my understanding is I get the update for free.
Existing V13 user don't get free upgrade. You will have to pay for the upgrade when it release in September. The Magix offers is for new buyer or current buyer of V13 and will receive free upgrade to V14. I just take advantage of this offer and I bought it.