Selling things successfully
Lessons from Running a Sale that Earned 3 Month's Profit in a Week (HN)
Small electronics
Metro board. Reddit made with two 64x32 RBG LED Matrix
Reddit retort information
CSAM at onion services
In 2018/19, less than 1% of child sexual abuse material (CSAM) was hosted on onion services. See page page 54. PDF source from here.
Other
https://reddit.com/r/programming/comments/kjjijf/a_complete_guide_to_llvm_for_programming_language/
Pointers Are Complicated II, or: We need better language specs
Cranks' version of arXiv: https://vixra.org/
Spotting palaeontology cranks: https://markwitton-com.blogspot.com/2019/02/how-to-spot-palaeontological-crankery.html
NYTimes crossword for free: https://nytsyn.pzzl.com/cwd
Hosting wiki repo with gitolite: https://ikiwiki.info/tips/Hosting_Ikiwiki_and_master_git_repository_on_different_machines/