There are in total 36 Gold Positions divided in 4 Gold Maps in UVioO. When you purchase them you become an investor and enjoy returns when advertisement is sold.
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Gold Map 1
Gold Map 2
This is how they explain it on their site:
You can acquire 36 Gold Positions! A bit like in the Monopoly game, the more land you own on the MAP the more money you make afterward. On UVioO you can acquire advertising land. We call them Gold Positions. Once they are yours, you make money each and every time we sell ad space to advertisers on any one of those Positions you own.