On an old phone? Pure profits when I'm running that 5v USB C on solar. ~110 h/S rate, but with a pool it's about 0.01 USD per day. Also, more nodes running the network the better for people running away from financial persecution or just war, genocide, prying eyes etc. I'll gladly give my hashes for freedom and privacy tech, that's the real ROI here (but I also get paid to do such things unlike some other nodes)