It's really not that hard to support them. Yeah some never post or they quit music after being on the show and that is sad and it probably has happened to favorites from everyone. But if you watch these shows for a long time there is bound to be plenty of former contestants to follow that frequently post new stuff whether it's covers or they release new music on Spotify etc. It seems like almost every week at least 1 one my favorite contestants release a new song to listen to. I've met so many of my favorites and been to so many concerts to support them. Hell I was at a show literally last night. Watching them on The Voice and Idol is also a lot of fun that's why I like the shows but it's a lot more fun for me at least to keep up with them post show and seeing all the improvements and hearing all the great new music that they release.