How does appen compare against scale AI in terms of 

1. valuation

2. feature

3. # of customers

https://techcrunch.com/2020/12/01/scale-ai-hits-3-5b-valuation-as-its-turns-the-ai-boom-into-a-venture-bonanza/?guccounter=1&guce_referrer=aHR0cHM6Ly93d3cuZ29vZ2xlLmNvbS8&guce_referrer_sig=AQAAAH1jiMDyaweVfB68uUTduVE8jgOk37yloo5Qi2mOgbH24biAzj20tytUOYhi52Gbg8DBTZdiQFHXTM1w1TWFzuXyhDR9QryoyaEKDAsf_ESq-SvSBqegUN7159L2tZYkgrPN11BybgJkwIFZMoaeKI-sH3qXM4jjEFmLanaCUCyo