This website seems to be similar to reddit except with an older UI. It's obviously more focused on the topic of bitcoin but I can easily find a group on reddit to talk about bitcoin.
I had originally thought this was a place for Bitcoin developers to come together to build on the Bitcoin blockchain. Then I watched it evolve into a place where users could find crypto services and speak with the developers directly to give them ideas or receive guidance. Now it's more of a what you make of it website. Some people come here to spam for income, chat about BTC, find services, get help, trade goods, or just plain take out their aggression on strangers on the internet. Basically, you can get whatever you want from this website, but with more clutter you may have to dig a little deeper to find what you're searching for.
As for reddit, I've never see any developers there building anything for BTC. Maybe I'm not looking hard enough, but that seems like a place to just spread BTC news, not actively engage in using or developing BTC infrastructure with other members.