I mean, when we read that page, it doesn't leave a bad taste in my mouth -- saying this as somebody who's generally very skeptical of VC-backed FOSS. It seems like the founders have their heads and their hearts in the right place, to the extent that calling it a growth hack feels wrong to me, personally.
But yeah, in the long term I agree with you, it'll probably fall apart in the way you expect within 10 years. It's hard to outlast the financial interest of investors, even if they're you're friends.
Expect the usual tension of open core shenanigans to eventually play out.