Each person, and the founders of HubPages, have their own purpose. HubPages is an online community, and not a single monolith.
I have three objectives, and none is primary. One is to write and share, which is my way of celebrating life and helping in the world. Another is that I get rapid feedback and appreciation, which feels great and keeps me writing. A third is that I want to make passive income, to free up more time for writing.
So, for me, it's all about writing, just in different ways!