Goodness! There are several factors cropping up here which I think people don't understand.
1. No shop is entitled to make a profit, much less, survive.
2. A bad shop (high prices, poor customer service) is less likely to survive.
3. Bad shops still offer air. Is it wrong for a bad shop to fail? Should divers support a bad shop just because we need air?
4. In the modern era, ANY shops can have an online presence. Note that LP and ST both are brick and mortar shops with an online presence. Complaining about supporting "online" shops is stupid in those two cases, s they are not purelyonline shops.
5. Just because a user buys things from other stores, that does not mean he has not spent some amount of money at his LDS. You all are jumping to conclusions, I believe. Personally, I buy some things from online shops, such as my 7 foot hose, mask and booties. However, I bought a bp/w, two tanks and instruction from a local shop, about $1400 worth. It is possible for me to support multiple shops.
Please stop crucifying the guy for wondering where to get air, there are many reasons the shop could have closed, but capitalism tells us that when a shop closes it is usually for the better good inthe long run, as consumers typically support the good shops. I'm sure we can find this guy somewhere to get air!