Ethereum was available in Keymaster (the original name of the Casa multisig app) back in 2018, before the original Casa Node was released:
Looking back, it’s more like they temporarily removed it rather than pivoted. But all of that is unrelated to the fact that they ran SatsApp to incentivize early LN nodes to stay online, and that the majority of LN nodes on the network were probably Casa Nodes for a while (definitely the majority of tor nodes).