not sure about stats but here https://www.bloomberg.com/news/articles/2020-12-16/quant-trading-platform-quantopian-closes-down
Don't other people pitch strategies? I read that Ernest P Chan had pitched strategies when I read his book. Anyway I just found out that Quantconnect can't share my strategy.
Thanks. Very interesting article. Most memorable item from the article: In a 2016 paper, four Quantopian employees found that the more backtesting a quant did, the bigger the gap between the reported results and the real-world returns. Still the OP might want to read the article since it mentioned some alternatives to Quantopian