yeah I think having both is the best approach. The availability of such options and allowing the individual minter chose which approach he/she wants to go with is more efficient. The option of NFT lock results in scarcity of these NFTs and allows for a more valuable market pricing… also, these people who trust in your vision would be rewarded with these rarer Manacites (and maybe some more perks you can add to make it a good option). All in all, I believe having both is good for both short-term and long-term performances