It used to. Kind of. The APi endpoint for accessing someone's lifetime upvotes minus downvotes was never used in the webUI, and was removed completely a while back.
The devs don't want accounts to have "scores".
If you're just referring to votes in general, that's not what "karma" refers to. Karma on reddit is how much upvotes your account has gotten vs downvotes. How "good" you are.
The idea is that with that number visible, you get people "karma whoring". Posting just for the sake of it, often with low effort, either to inflate or tank their scores as high/low as possible.
Also, it points upwards, the satanic version is upside down (like the satanic cross).
The pentagram has far longer been a holy or symbol of protection for people who are into that kind of thing. Not sure if that matters though because it also applies to the swastika.
People need to chill about pentagrams. I've explored enough paganism to know they're good symbols with pleasant intent. Christians really fucked those up for everyone like they did everything else. It's a shame that their satanization of old religious and spiritual imagery has affected the perception of even non-Christian folk.