Interesting that the services are 'sold out' however the economics might pencil out for many.
$9.99 a month: 1yr= ~$120, 2yr= ~$240, 3yr= ~$360, 4yr= ~$480.
$19.99 a month: 1yr= ~$240, 2yr= ~$480, 3yr= ~$720, 4yr= ~$960.
Of course all depending on what level of GPU card one purchases and how often they are purchased. Granted these 'cloud gaming' solutions depend on a reliable high speed network connection which in itself can be costly.