WOS is a lightning service provider LSP. They have multiple channels open with well connected nodes.  They are letting you use their channels. These channels channels don’t open and close regularly. They have a balance of funds on both sides of the channel and they “top up” and rebalance channels when necessary. Running your own node with Zues wallet will really help you understand how channel opening and closing if works if you want to dig into it. 

 Thanks, I'm taking a look at the Zeus website, which looks really helpful. Since this allows you to run a lightning node on your phone, I guess it's sort of an all-in-one package with all the software pieces in place that you need to learn by doing. 

 Just make sure you realize that when using a non-custodial you will have to pay on chain fees to open and close any channel. When using a custodial wallet  they handle these fees and take much smaller fees for clearing transactions.