Gets the monthly offer and the environment of this request, when the product enables subscriptions.

Requires active monthly sales, or staging enabled and a test payment that the server authorizes. Without this authorization, it answers 404. It does not create a charge, reservation or benefit. It does not convert the trial into a subscription. Returns: { ofertas[{id,produto,versao,preco_centavos,moeda,ciclo,renovacao_automatica,compromisso_meses,cancelamento,acesso_pago,teste_dias,conversao_teste,beneficios,hash}], simulado }