Just read about Instavest on a recent WSJ article.
It made me think Quantopian has everything set up to offer a similar, even better service in which Quantopian users co-invest their capital with the real money trading algorithms of fellow users for a share of the profits. There's already an established community on this site, Quantopian can provide verifiable real-money trading records of its users from deployed algorithms, and it sounds like Quantopian already has the capital sharing functionality implemented for their contest winners - I imagine it would be straightforward to make such functionality public.
On Instavest, co-investors send their money to a stranger, while on Quantopian, coinvesting would presumably constitute having another person's algorithm execute in your brokerage account; Personally I would be much more comfortable having with the latter since the money stays under your brokerage account instead of going into someone else's account, and algorithmic trading results are more predictable than that of people. Overall, I think Quantopian's algorithmic real money trading implementation is much more suited to the community investing vision Instavest is going for.
PS Instavest does not support brokerage linking of IB or Robinhood accounts so its impossible to share verified Quantopian RMT results on the site.
If this ideas already been brought up, I apologize but I did make an effort to search for duplicate posts (of which I found none)