Now that you just have to be compelled to pony up for PlayStation and to play online on the PS4, it appears as if Sony is packing in free trials with numerous multiplayer games. It is in a way similar to how Microsoft packaged them on the 360, a few of the games so far like FIFA 14 and Assassin’s Creed IV have had vouchers accessible, therefore this seems to be a factor going forward.
They’re a little less necessary on the PS4 but, as all accounts on the system will benefit from a plus membership (the Xbox One does the same thing for Gold) — as opposed to the 360, where every account had a separate Gold status. But still, free is usually smart.