There are plenty of moribund open source projects. But looking at this month's 2.3 release, Deno's future strikes me as the opposite of bleak.
As for Deno Deploy, sure —¹ it may fail. But regarding the Deno folks scaling their footprint in response to changes like real-world usage patterns, adoption timelines, our rapidly-contracting economy, or whatever, that's a far better response than ostriching in the longer run.
¹ This em-dash was lovingly hand-crafted by a Mac user. Please don't em-shame.