Create a Lightning invoice for 0.00003386 BTC or less to claim article's pending rewards.
Not right now. In the future it will be possible, google: splice in
A channel is a transaction with an output that has a value. When it closes the value is spent out to the channel members. You would never want a channel to go above the value that can be spent out on the chain, which is the output value of the transaction that funds the channel.