Shopify accepting LN is indeed a big news! Especially for those, who are willing to see bitcoin getting accepted within the mainstream economy! For those who doesn't know what shopify is, it is a e-commerce platform provider where common people like us can make their own e-commerce store. They also have connections with big vendors which empowers small business owners to connect with them and sell their products through their own store. In one sentence, it is a simplified e-commerce solution provider with huge customer base not less than few millions.
Now when such a big provider like Shopify starts accepting bitcoin payments, is a great news for the community. It will empower all their stores to use it as a payment gateway for their customers! KYC and centralization is another debate which will keep on going here, but it is certainly another step ahead towards mass adoption!
Just don't forget that this is also a good marketing trick for Shopify...
The world is full of companies, doing the same thing... how you can be different?
E.g. you draw a beautiful logo which everyone will recognize after a while in a second and will search for that beautiful logo after...
Or you can ask a famous actor or movie star to use his/her face/body/etc.... in your advertisements, to let people connect your service with that famous person and trust your service before they even tried it...
Or, you can use bitcoin, to let people know that you accept bitcoin... most of the people just heard about bitcoin, and it's too technical for most of the average joes, so if a shop or anything can accept bitcoin, that means that they are really good and they will be really rich because of bitcoin, so they will remember and use the service of that company... Bitcoin still has a kind of hype around itself, so it's still a good marketing thing to use bitcoin (of course with KYC, just to be on the safe side...)