Hello,
You can surf faucets to earn easy satoshis.If you want more,you can work for bitcoin.
This is free earning of bitcoins but this takes a lot of time to earn with good amount of bitcoins. Signature campaign is way better to collect btc and you can also sell your services and goods.
Yes absolutely right it will produce very little. To generate a bitcoin many must sell services and goods to be traded, but I still do not understand it. I think with the signature campaign in bitcoin income is enough.