Hey buddy, I think you're forgetting that wow is part of a company and it's one of their major products they've been relying on for years. You may hate BFA and all the people who are still subscribed and playing BFA, but I can assure you Blizzard doesn't think that way. Imagine you sign up to go on a brand new cruise ship. The cruise ship company has a bunch of loyal customers who have been going on their cruises for years so they let them tour the new cruise ship the day before, however they decide to let new customers go on the tour for a small fee if they want to. That's what this is like. They're giving a little kick back to all the people who have stayed subbed to wow. I haven't played wow since the middle of legion and I can totally understand why blizzard would do that. You may think classic is all that matters. Blizzard still cares very much about the BFA players.
If possible, avoid purchasing Gear from the Auction House - Ideally, you should be able to achieve level 60 without buying anything from the Auction House. This way you will save Gold, but possibly make leveling a bit harder for yourself. If you badly require an Item upgrade, and the suitable Item is available on the Auction House for a low enough price - buy it, but only if you think that the investment will pay for itself in one way or another (the main exceptions to the Auction House ban Rule are Weapons and Wands, as they make leveling much faster, and pay for themselves by allowing you to chain-kill more mobs without Eating and Drinking, which saves Gold and time).
Whelgar's Excavation Site - This Dwarven excavation site was overrun by Raptors (Mottled Scythemaws and Mottled Razormaws). These reptiles are a great source of Medium Leather (you should have Skinning Profession if you want to farm here, as a very large portion of income that comes from this spot is acquired by Skinning Raptors). They also drop some Vendor Trash Items and Raptor Eggs (these are convenient, as a Cooking Recipe for them comes from a Quest that is located just above the Site) that can be used for Leveling up Cooking Skill. However, the best part about this spot is that both Raptor types present here drop level 19 Twink Gear (Feet of the Lynx, Sentry Cloak, Redbeard Crest, and Twisted Chanter's Staff) that will achieve astronomical prices at the later stages of the Game (drop rates are very low, so some RNG is involved, sadly). Recommended Level - 25+.