You don't think holodecks will come with freemiun subscription plans or micro-transactions, a la video game skins and upgrades today?
Why would someone sell you a holodeck once, when they could sell you plugins and content modules for your holodeck continuously forever? You don't think you'd get bored looking at the same trial plan holo-beach for years?
Of course, piracy and/or open source will hopefully be around to offer free alternatives.