The guide does seems to work and is legitimate as far as I can tell. I think it's easy to follow but i guess for Reddit "newbies" the guide can be further fleshed out and provide better detail and explanation. Grammar is okay too but also has some room for improvement.
Personally I would not buy this guide because I dont think reddit karmas are worth much money or anything. but if you for some reason want to build some karma you can try using this way. It is some work of course but it's still a working method when I tested it.
Price is a bit much for a reddit karma guide so that is another factor why i personally would not purchase it, i would agree a lower price point may attract more customers.
Thanks for the vouch.