I agree that's a hurdle, but the trick is getting people to jump it on their own. Worded correctly, that sentiment could engender exclusivity and quality: it's all in the marketing.
Enough people have heard the "If you're not paying, you're the product" line that some variation on that should hit home: ie, "Memo.cash - where you're not the product"
And enough people don't care if they are the product. They'd rather pay in tracking and advertising and surveillance than with a couple bucks. This is billions of people.
I think they *DO* care if they're the product; they just don't know any other way. This problem is not endemic to memo and will require an overall shift in the consumer zeitgeist.