Welcome to the contest. I very much like #50. Well done.
I'd like for you to submit a few variations of #50 with the hub and spoke models that I reference in the update to the brief. To save you some time, I've found myself most attracted to 6 "nodes" coming off of the central icon. I'm torn between the symmetry of some of them and the varying lengths of others. Both look good to me.
Looking forward to a few more submissions. Good work.