Yes @timcliff, you are right, so I should elaborate my proposal a bit more. To be more specific, I'm against straight dumping content from mainnet into the testnet, that is why I suggested AI and I should add statistical analysis as well, which should mimic human behavior with an smaller database of content "recycled" (statistically down-scaled) from the mainnet. In means that we should end up with a lightweight fake steem blockchain that can still provide meaningful feedback. I know that it might sound very complicated, but let the big data experts debunk this alternative. I still prefer to let the community play with fake steem freely, AI can come later.