Simple OSINT treasure hunt challenge

I created a simple treasure hunt challenge for young InfoSec enthusiasts and professionals. It's mainly OSINT with some very basic crypto and a tactical story. No real prize except bragging rights and mentions if you choose so. 

No details collected and you can choose whether to submit the final solution.
The challenge starts on my Linkedin profile https://www.linkedin.com/in/spirovskibozidar/

The challenge will be active until the end of October 2018, after which a full writeup will follow.

Also, ideas for the next challenges are greatly appreciated :)

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