It doesn't, thats why its called a Hobby
Some people are satisfied with getting 1 mod until it becomes useless or breaks, but like me some like to collect the newest and greatest, its no different then a stamp collector, coin collector, or collecting rare wines.
Also, when i see a friend smoking, i give them one of my mods and set them up for free to get them off smoking.
Awfully noble of ya...I've only been vaping for a week and a half, already spent more than I should on this hobby and it feels like an never ending hole...sometimes I wonder if Im just replacing my addiction to analogs to an addiction for mods.