Despite being a free-to-play game, Blade and Soul offers the usual subscription option for players who want to earn some benefits that aren’t within reach of free players. You can choose between 30, 60, and 90 day Premium Memberships through the in-game shop (Hongmoon Store). When you purchase a Premium Membership you start at Rank 1, and can then begin climbing your way up to Rank 10 as you accumulate Premium Points by spending NCoin and Hongmoon Coin in the Hongmoon Store.
The membership tiers let you accumulate gold or XP faster than free players, among other things such as reduced marketplace commission fees and faster chi recovery. You can check the entire benefits in this chart.