Yes it's tiny but it's the kind of people that tend to influence others. Not in using F-Droid, but using signal yes. It could help adoption overall.

I've used F-Droid for years. It's simple, has good apps that aren't full of ads, just works. PGP... sucks a lot, I never really got along with it. Maybe an age thing, but hardly anyone I've met uses PGP/GPG. Yet I have many friends/family on Matrix.

Having signal on fdroid and having it build reproducibly would make me trust it.

As it stands it's a proprietary app with a lot o marketing to convince me otherwise.