What's your source on this? They just very recently reached 100K downloads on Android and according to various SEO tools, they get maybe ~4M visitsper-month (and these tend to overestimate, plus it's monthly visits, not DAU).
with capital investments required to keep them afloat, it may be not enough.
What’s the curve like
+10% every week in the last two months, as reported by Mustafa Suleyman.