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I'm not a valve developer so I can't tell you exactly what is happening, but you most certainly can serve different certificates to browser vs mobile. The apps

I'm not a valve developer so I can't tell you exactly what is happening, but you most certainly can serve different certificates to browser vs mobile. The apps are using WebViews which are not the same as Chrome and Mobile safari. It would make sense to us a CA cert for normal browser traffic as it is fairly sandboxed as far what you can and cannot do, the WebViews are a completely different environment. Again I'm saying this based on real world experience with why someone would use http instead of https, so my point is just a guess. I might be giving Valve too much credit and trying to explain something that is just a mistake. I am basing my theory on the fact that the http endpoints immediately re-direct to https ones, so it seems to be intentional for one reason or another.

kbenson 6y ago
> I am basing my theory on the fact that the http endpoints immediately re-direct to https ones, so it seems to be intentional for one reason or another. I don't know, that seems pretty bog-standard to me. You redirect to HTTPS when someone requests HTTP when you want your traffic to all be secure. At least, that's how it used to be, these days browsers be be more aggressive in trying to hand you to the HTTPS version of sites if port 80 doesn't respond, and in that case it might make more sense to turn down port 80 as long as all browsers do the right thing.