That's not an option for everyone, especially if you don't want to GPU-mine alts.
then they can do this
first get a meter to see the power you draw.
I pull 70 watts so 70 x 24 = 1680 watts so round to 2 kwatts a day.
that is 25 cents in the winter for me
and 32 cents a day in the summer
then with a small desktop like a lenevo m700 tiny I got one used for 200 bucks I opened it put in a used i7 6700t for 200 more sold the g4400t for 50 net cost for pc = 350
I loaded nicehash to cpu mine and I earn 40 to 50 cents a day
I run 3 compacs and a 2 pac and the cpu miner
the usb sticks point to bravo-mining I can get 1 btc if I am the block hitter and they also earn 4-5 cents a day.
so 57 cents income - 32 cent power in the summer = 25 cents a day with a shot at 1 btc on any and every block made.
pc cost =350 it would be paid for in about 4 years. but I use the pc for all my windows work.
I support side hack sticks and bravo mining.
adding a pod or 2 will make more money as pods do higher hashing.
and my cpu does not get superhot with newer nicehash software.