Join monthly on Patreon or Gumroad: free packs from each month's releases, a member discount, and bundled packs, recognised automatically in your Refimages library.
Pick a tier and pay on whichever platform you prefer. Perks are the same either way and switch on in your Refimages account automatically once the payment is recognised.
Membership is separate from buying a pack outright — anything you purchase stays yours whether or not a membership is active, and a membership starting or ending never affects a pack you already own.