diff --git a/src/calibre/gui2/store/stores/ebooks_com_plugin.py b/src/calibre/gui2/store/stores/ebooks_com_plugin.py
index e7f7762528..1c1e0bd08e 100644
--- a/src/calibre/gui2/store/stores/ebooks_com_plugin.py
+++ b/src/calibre/gui2/store/stores/ebooks_com_plugin.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 
 from __future__ import (unicode_literals, division, absolute_import, print_function)
-store_version = 1 # Needed for dynamic plugin loading
+store_version = 2 # Needed for dynamic plugin loading
 
 __license__ = 'GPL 3'
 __copyright__ = '2011, John Schember <john@nachtimwald.com>'
@@ -27,12 +27,8 @@ class EbookscomStore(BasicStoreConfig, StorePlugin):
 
     def open(self, parent=None, detail_item=None, external=False):
         m_url = 'http://www.dpbolvw.net/'
-        h_click = 'click-4879827-10364500'
-        d_click = 'click-4879827-10281551'
-        # Use Kovid's affiliate id 30% of the time.
-        if random.randint(1, 10) in (1, 2, 3):
-            h_click = 'click-4913808-10364500'
-            d_click = 'click-4913808-10281551'
+        h_click = 'click-4913808-10364500'
+        d_click = 'click-4913808-10281551'
 
         url = m_url + h_click
         detail_url = None
diff --git a/src/calibre/gui2/store/stores/kobo_plugin.py b/src/calibre/gui2/store/stores/kobo_plugin.py
index 847e57f718..68402909ce 100644
--- a/src/calibre/gui2/store/stores/kobo_plugin.py
+++ b/src/calibre/gui2/store/stores/kobo_plugin.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 
 from __future__ import (unicode_literals, division, absolute_import, print_function)
-store_version = 4  # Needed for dynamic plugin loading
+store_version = 5  # Needed for dynamic plugin loading
 
 __license__ = 'GPL 3'
 __copyright__ = '2011, John Schember <john@nachtimwald.com>'
@@ -86,11 +86,7 @@ class KoboStore(BasicStoreConfig, StorePlugin):
     minimum_calibre_version = (2, 21, 0)
 
     def open(self, parent=None, detail_item=None, external=False):
-        pub_id = 'sHa5EXvYOwA'
-        # Use Kovid's affiliate id 30% of the time.
-        if random.randint(1, 10) in (1, 2, 3):
-            pub_id = '0dsO3kDu/AU'
-
+        pub_id = '0dsO3kDu/AU'
         murl = 'http://click.linksynergy.com/fs-bin/click?id=%s&subid=&offerid=280046.1&type=10&tmpid=9310&RD_PARM1=http%%3A%%2F%%2Fkobo.com' % pub_id
 
         if detail_item: