Think of products/startups as fires, they start small, can't use large logs straight away, need constant attention, you could use a lot of petrol (financing) to get it started faster, but it could also just fizzle out immediately if the large logs don't catch fire as well.
Once they get going, you don't have to watch it so closely, you can just add a log here and there, maybe remove some ash.
The goal of the fire is to get people to gather around it. The warmth in this case matters a lot, but also the people gathering around the fire.
In fact some people might pick another fire because it has people who are interested in the same things as them.
Sometimes a fire gathers TOO many people, and it gets crowded. The maker of the fire didn't make sure it grew large enought to provide warmth to many people - and so people on the outside get cold and go to another fire.
Most of the time though, if someone is by a fire that provides enough warmth for him and he likes the people around it, there is little compelling reason to go to another one.
I guess if you wanted to get ridiculous with the analogy, you could make the "balls" of different materials, some of which are very strongly attracted to the magnet and others which take a lot less force to pull away.
I mean unless you meant lead for some particular reason, that doesn't really matter and this comment just becomes useless nitpicking (and by becomes I mean always was), but I'm trying to justify making this comment to myself, and I come up with the justification that I really don't understand why you picked lead.
Is it because of the density?
It'd be pretty impressive to get lead to exhibit magnetism…