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Hi! Sounds great! However i get he message that the discount code is not valid anymore and it is $19.99 again. Am i doing something wrong?

• opsdisk 7y ago
  Just tried this link and it still looks like it's discounted: https://gumroad.com/l/the_cyber_plumbers_handbook/hackernews20190518 https://gumroad.com/l/the_cyber_plumbers_handbook/hackernews... Let me know if it's still not working.
  • beastea 7y ago
    it says that promotion code expired
    • opsdisk 7y ago
      As stated in the original post, it was only valid for 2 days through May 19. If you're a student, you can still get it for free. Just checkout the website for details https://cph.opsdisk.com https://cph.opsdisk.com