You can also do signature campaign or facebook campaign. Or you can go to bitcoin faucet. If you get enough coin you can Exchange them with Ethereum after. But it will take a long time to get 1 Ethereum. I don't know how many months or years you will need to get 1 Ethereum. But it can help a little to go to faucet and do campaign. The fees to transfer coin is also very high. So it is really difficult to earn more than the transfer fees just by doing thoses things.