It's all rigged, technically. If you go to a real life casino, slots are certified to pay out some percentage of plays. It's like, 8%.
If you play craps, roulette - the house always has the edge because there's more results favorable to them.
The only "casino" game where the house doesn't have an edge is poker because that's player against player. The house doesn't really have a stake in any outcome, they're just being paid to host the game.
Depends.
Sometimes I just can't find the actual thing by legal means. Go try listening to Bruce Woolley's version of "Video Killed The Radio Star" sometime. I can either try to hunt down a physical copy or I can just pirate it. See also: most video game soundtracks.
Usually though it's more about convenience. If I can just stream something on Spotify, I'll just do that.
If there's a movie I kinda wanna see but I'm not sure if it's going to be good I'll pirate it