You're almost right... Revenue is what SDA bills the customer. I understand SDA will retain ownership of the app (which makes sense as they are the ones with the commercial agreements with final clients and will handle billing). Thus the revenue will stay the same (or grow or whatever) and be earned by SDA only. So from their revenue perspective, no change.
They then pay their supplier, Ziptel 50% of the revenue earned. But this is just a COGS and doesn't diminish the total revenue receipted by SDA. It's just a payable you need to consider in their net earnings. After Ziptel have been paid, SDA are left with earnings of 50% (less marketing, less Satellite maintenance costs, etc). But you are right, earnings improve as their COGS drops through the deal.
So revenue on their books doesn't move, but their margin on wholesale improves.
That's my understanding.
ZIP Price at posting:
16.0¢ Sentiment: Buy Disclosure: Held
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