Now’s a good time to reduce the price of HBO. Via April 9, new and returning subscribers to Max, HBO’s streaming service, at a reduction of as much as 45% (versus regular month-to-month charges) by prepaying for a 12 months. The low cost is offered on plans with and with out advertisements: The deal works out to about $5.83 monthly for the plan with advertisements, $8.75 monthly for the advert-free model and $11.67…