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.
Tainted Oozes (market GREEN on the map) - Oozes infest Felwood in great numbers, and although they do not have too good Loot Table, they might be still worth Grinding. This spot is a long shot, so be warned. Felwood Oozes have a small chance to Drop Oozing Bag which in turn has a small chance to contain the Disgusting Oozeling Pet (this pet is used to throw off various Debuffs in Raids, so many Guilds will require you to have it), the Bag can also contain various Potions, Herbs, and Gems. Oozes themselves drop a lot of low-value Vendor Trash Items and some Pocket Money (they can also be Pickpocketed, so Rogues might be more interested in this spot). Recommended Level - 50+.
So committed, in fact, that modern WoW players are trying the beta and reporting what seem like bugs today but what were actually intended functionality 13 years ago. This became such a common occurrence that Blizzard publicly posted a list of known non-issues called the "WoW Classic 'Not a Bug' List." For example, hitboxes for the Tauren player race are much larger than those of other races. In a modern game, this would be seen as a serious balance issue (see: Apex Legends). But it's what vanilla WoW was like, so it has been faithfully reproduced.
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+.