Earlier quoted context omitted.
If they run a lightning wallet and open it for donations, they'd see that percentage rise dramatically at virtually no cost.
How does that make a difference? As I understood it, every individual would still have to do a regular on-chain transaction, it's only if you later realize you actually wanted to donate more than you did that this could be useful because then you avoid the full transaction fee. Or if you let it run over years without settling and do a yearly donation, though I'm not clear on the implications there. Or, if the on-chai…
The assumption is that Lightning users already have active open channels to other nodes in the network, and so making a new donation to Wikimedia would not require any additional channel opening, and no on-chain activity.