Ann: Syntonic Investor Presentation-SYT.AX, page-114

I suppose it's an interpretation of what the bold section below means.

One third (1/3rd) of all Performance Shares held by the Holder as
at the date of issue of the Performance Shares (Issue Date) shall
convert upon Freeway by Syntonic® (including the white-label
version of the product sold by partners) having an Addressable
Audience of 100,000,000 mobile subscribers within a period of 12
months from Settlement;

As subscribers use mobile data usage, perhaps customers should be the word we use for Syntonic users.

Not sure what addressable means.