This plugin will allow your customers access to your support forum/blog only if they have a valid Envato Purchase code during registration.
Check it here: https://1.envato.market/jvalidate
▶Portfolio – https://1.envato.market/coderevolution
▶DONT CLICK THIS – https://www.youtube.com/channel/UCVLIksvzyk-D_oEdHab2Lgg?sub_confirmation=1