I don't think any of them is the next Google or YouTube, to be honest. Take for example the first one: I thought the locksmiths can crack any door within seconds anyway (typically just by looking at it), so that service is completely useless. The others are also weird, but you never now - I guess the dog food vending machines could be really big (dog owners are weird, too).

Heybuddyvending has some serious potential in a market like Boston or NYC which are full of colleges and in need of internships.