If you look few posts above you'll see I've already said it. Is somewhere around 5.75% a year (more or less, depending on the pool you choose to delegate your coins), not something you''ll get rich with but is better than nothing like it was before Shelly. I don't know what is the minimum amount to delegate to a pool, but I assume is 1 ADA, which is not worth the pain to delegate it, if you ask me.
I think that it makes no sense to delegate amounts less than 1000 ADA coins. The profit will be negligible. Today the profit is about 5% per annum. This is a very modest figure.
I feel the same, but people can delegate any amount, even 1 ADA, so we don't want to discourage anyone, even tiny bags.
Maybe the figure is modest, but imo 5-6% is the sweet spot for any ROI since is not too big to have a big inflation and the market to be flooded with coins, not too small so the investors/holders loose interest in staking.