Buy it in USD or Robux and it's yours to keep, or boost the Discord and hold access while the boost is up. All three end with the same plugin in Studio.
You buy through Payhip and get a license key, which you redeem in a Roblox place to unlock the plugin.
You buy inside a Roblox experience and Vendr sends you the plugin file straight away. No key to redeem.
Boost the EasyLS Discord and you get access for as long as the boost is running. Nothing to pay us directly.
For your own copy, we'd go with USD. Robux prices have to be marked up to cover the Roblox tax, so the same plugin ends up costing you more that way. The only reason to pick Robux is if you'd rather not pay with a card. Buying it for someone else? Use the USD option, since that's the one that produces a key you can hand over. Boosting is the odd one out: it costs you nothing extra if you're already boosting, but it's access rather than ownership.
Options 1 and 2 run through Vendr, so the first time you buy you may be asked to link your account. That's normal. Boosting skips all of that.
You'll get a license key after checkout, then redeem it in the key claim place on Roblox.
You buy in the purchase place and Vendr sends you the plugin file. Nothing to redeem afterwards.
Boosting the server unlocks the plugin file for you. This one is access rather than ownership, so read the note underneath before you pick it.
Your access lasts exactly as long as your boost does. Cancel the boost, let Nitro lapse, or move the boost to another server, and the plugin stops working for you. If you want to keep EasyLS permanently, buy it through Option 1 or Option 2 instead.
Same five steps whichever way you bought it.
The file won't do anything without a license. Finish one of the purchase options above before you try to install it.
Open a ticket in #tickets on the Discord and someone will walk you through it.