Will KILT do a Polkadot crowdloan at the end of the Kusama 48-week lease?
KILT will definitely not enter the first rounds of the Polkadot auctions. KILT Treasury will mint KILT and subsequently exchange them into DOT until the network can sustainably acquire Polkadot slots. After that, KILT governance will decide if the the whole network is moved from Kusama to Polkadot. But for the time being KILT will stay on Kusama.
It's important to note: there will always be only one network. Either on Kusama or on Polkadot. Also there is only one KILT Coin, completely independent from whether the network runs on Kusama or on Polkadot at a given time.