This can hardly be called an update since you didn't even mention any numbers, like the amount of customers that payed with bitcoin or what kind of percentage of your customers used bitcoin etc.
How is that possible? If you run a store, don't you have expenses and obligations towards the state and your employees (salaries and taxes)? Do many people come to your store and pay with bitcoin and do you just not declare that as income?
If what he saying is true, he probably has enough cash on his hands to cover all the merchandise sold via bitcoin and additional expenses so he wasn't forced to sell any of the bitcoin received.
I don't know about the others, but this whole story smells fishy to me as according to OP, on the very same day he implemented LN, 4 persons used bitcoin in his store.
I would like to thank the people who replied to my topic where I asked a few questions regarding the implementation of Bitcoin. Putting that aside, I have successfully implemented "Lighting Network" Bitcoin payments in my hardware store. Already 4 different persons have used Bitcoin as a payment today.