It's FOSS - https://itsfoss.com/linux-journal-discontinued/
Brief: Financial issues force Linux Journal to cease its publication after 23 long years in the market.
It’s a hard time for veteran publishers. It’s a continuous struggle to survive in this digital age when content is available free of cost on the internet, ad-blockers hurting the ad revenue and the paid subscription number keep going south.
Just search for ‘magazines going out of business’ and you’ll find numerous articles about decades-old magazines shutting down.