Tell me about public blockchain apps that do not involve objective money or objective identity, which require strict global consensus, why they should be built on public blockchains, and why haven't they been built yet? I'll consider writing a post, when I get back to it, to explain why it does or doesn't make sense

Attribution across brand loyalty points 

Eg McDonald’s should be able to vampire attack the people with top 5% of Burger King loyalty points

Enables a more competitive brand marketplace/discovery leaving the consumer better off. 

Attribution is what made fb and google big because they charge ads for this stuff

lore @optimism | ex: @coinbase | views are my own | what if it all worked out? 

Entire world should know so smaller businesses can also take advantage of this