They became a "real company" when they signed the search deal with Google and stopped using Inktomi (search had been a secondary feature of Yahoo until that poi

They became a "real company" when they signed the search deal with Google and stopped using Inktomi (search had been a secondary feature of Yahoo until that point; the real "value" was seen in their Big Blue Wall of curated links). That was also roughly when they finished fully integrating Viaweb (Hi, PG!) into their store. This was if my ancient memory serves roughly exactly during the April 2000 crash.