It could be. I think WoT with some manual WoT bump-up is a great option for an Inbox relay. WoT is terrible for Outbox, though (a simple paid relay is easier). The key part is making it setup of the multiple relay lists we already use easier. If I sign up for Nostr.wine, for instance, there should be a tool that puts each of the relays they serve in the right list for me.