Let’s say I want to buy a JetSki that is expensive and I probably won’t use it much.
I can post on the website, that I am planning on buying it and would like 4 other people to chip in with me and share ownership of it.
This could be used for smaller items too, like a bicycle. Or even bigger items, like a house - 100 people chip in for buy a house.
Obviously there are issues with who pays for maintenance and who has legal ownership etc. but maybe this could be resolved.