Imagine a world when some men have risen to the title of gods. By buying power from others, people can become more powerful. Everyone is born with 1 "point" of power and the more you collect, the stronger you get; gods have several thousand points.
To be clear, each human is born with 1 point of power; this is the only source of new points. Points can be given freely, but can not be taken by force. If someone dies, all points they own are destroyed.
Gods are immortal, near unkillable and can even come back from the dead if strong enough. They can mark normal people as their "chosen" which lets their chosen borrow elements of the gods powers (primarily healing and precognition).
Gods can sense where their chosen are, hear their prayers and send mental responses. Having followers has no magical benefits for the god. In fact, each chosen carries a small cost in terms of power.
The question is this: Why would a god bother with having chosen at all? I'm having difficulty coming up with a good reason for it. The ideal reason would give gods reasons to want more followers (both chosen and unchosen).
The ego stroking inherent in a cult praying to you would work from some gods, but a less ego focused answer would be ideal.
As a lot of people have been confused on this point, think of points like objects. They can't be split or shared. You can give points you have to others, but you can't take them back (unless they give them back).