Here is a (very interesting) question I just received from one of our readers via the yellow note on the right menu:

"Hi Fabio, can you comment about the results from the advertising campaings that your customers get from advertising on your screen at Rosta (Torino). What is the renewal rate of contracts? Thanks."

Dear Fernando, thanks for the question. It is actually very interesting. I will answer it in a second, but first let me clarify the key point that your question highlighted.
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