Usually in addition to electricity itself you pay for using the power grid per kWh. IIRC here in Finland it’s around 0.07€/kWh. At one point due to some error the price of electricity went down to like -0.20€ and we were indeed paid to use electricity. Though we paid back with more expensive electricity a while after.
Isn’t the “standard” sim card in you pic actually mini-sim? While the standard one is credit card-sized? I think I have a phone somewhere that takes a credit card sized sim actually.