Mined a few when CPU mining was profitable.
it is still profitable

Can you say on that CPU's you are mining and how much espers you get?
My cpu does 140kH/s
i think it is about 500 espers per 10 minutes
May be you mistake? It is more than 4 million ESP per day
If it so - mining of ESP is profitable. I try it again

I don't think so. I've been mining on maxminers for quite some time now with 70kh and I am getting about 700K to 750K ESP daily.
So he should be getting about 1.5m