You can send the items for AWD as long as your eligible. It is usually used for large quantity of products, but you can still use it. No, it is not used for private label only. It is not worth it if your products are in cases but if you prefer it, then you can use AWD and no harm will be done.
AWD can definitely be worth it, especially if you’re looking to reduce storage and fulfillment costs compared to traditional FBA, and it’s not just for private label sellers—it’s becoming increasingly popular with wholesale and even arbitrage sellers who manage case-packed inventory. Since you don’t have a large inventory and are already working with case packs, AWD can be a good fit as it supports small case quantities and simplifies restocking across Amazon’s network without the need to constantly monitor FBA limits or inbound shipments. Just keep in mind that AWD is best when you’re selling regularly and can benefit from Amazon’s replenishment system, so it’s worth testing with a few SKUs to see how it integrates into your workflow and whether the cost savings hold up over time.