I don’t use this app, therefore hardly anyone does. Even if it cites a 5-10 million install base.
It’s totally ridiculous someone would use this app for the first use case I can think of. So obviously it’s no use at all.
“Lots of people don’t use this” and “Hardly anyone uses this” aren’t the same thing. Don’t mix them up when deciding whether to drop it.
Maybe a million users don’t use a feature. Is that 1M out of 5M or 1M out of 1.1M? 80% usage vs. 9% is a big difference.
Even then, what if the 9% of users who use that feature are more active? (90-10-1 rule). Or they account for more revenue?