They have a strong Libertarian/Austrian Economics focus on the economy. Some bloody excellent articles from some of the top investors going around.
I have made some great profits following their general advice e.g. physical gold and silver has been a call of theirs (Bill Bonner) for over 10 years. Most recently a profit on graphene stock.
However, I do not subscribe to any of their publications but know people who do and they have no complaints.