diff --git a/config/referral-rewriter-tag.php b/config/referral-rewriter-tag.php
index 927a50b..d5f6b93 100644
--- a/config/referral-rewriter-tag.php
+++ b/config/referral-rewriter-tag.php
@@ -2,5 +2,15 @@
 
 // config for The3LabsTeam/ReferralRewriterTag
 return [
-
+    'ebay' => [
+        'tag' => '',
+        'subtag' => '',
+    ],
+    'amazon' => [
+        'tag' => '',
+        'subtag' => '',
+    ],
+    'instantgaming' => [
+        'tag' => '',
+    ],
 ];
diff --git a/src/ReferralRewriterTag.php b/src/ReferralRewriterTag.php
index e31f65b..d968baf 100755
--- a/src/ReferralRewriterTag.php
+++ b/src/ReferralRewriterTag.php
@@ -35,6 +35,14 @@ public function rewrite(string $link, ?string $tag, ?string $subtag, string $add
      */
     public function rewriteAmazonLink(): string
     {
+        if(!$this->tag) {
+            $this->tag = config('referral-rewriter-tag.amazon.tag');
+        }
+
+        if(!$this->subtag) {
+            $this->subtag = config('referral-rewriter-tag.amazon.subtag');
+        }
+
         return $this->rewriteLink(tagKey: 'tag', subTagKey: 'ascsubtag');
     }
 
@@ -43,6 +51,14 @@ public function rewriteAmazonLink(): string
      */
     public function rewriteInstantGamingLink(): string
     {
+        if(!$this->tag) {
+            $this->tag = config('referral-rewriter-tag.instantgaming.tag');
+        }
+
+        if(!$this->subtag) {
+            $this->subtag = config('referral-rewriter-tag.instantgaming.subtag');
+        }
+
         return $this->rewriteLink(tagKey: 'igr', subTagKey: 'igr_extra');
     }
 
@@ -51,6 +67,14 @@ public function rewriteInstantGamingLink(): string
      */
     public function rewriteEbayLink(): string
     {
+        if(!$this->tag) {
+            $this->tag = config('referral-rewriter-tag.ebay.tag');
+        }
+
+        if(!$this->subtag) {
+            $this->subtag = config('referral-rewriter-tag.ebay.subtag');
+        }
+
         return $this->rewriteLink(tagKey: 'campid', subTagKey: 'customid');
     }