Aluminum Foil Wrapping

[O-Danger]

So we have all seen the cigars that come wrapped in Aluminum Foil (The Illusions have one out right now) along with older cigars like some clear Havanas. I also note that many custom rolls come wrapped in Aluminum foil (or some type of foil like wrapping paper) and some marketing ploys like the Boli GM's and Tat Blacks came wrapped in some type of foil. Now I have heard that this is one of the prime ways of retaining humidity but what side effects does it have? Is it some type of marketing ploy and is cello infact better for holding in the humidity? Does the Aluminum impart any sort of metalic flavours to the cigar? Just curious as I am thinking of putting aside some singles to age and was wondering if I should wrap them in Aluminum foil, leave them be, wrap them in newspaper, or in old cello? what do you guys think? Also the same question could be applied to loose bundles

Thanks