Added rough draft of subscribe button in gem shop.

app/styles/play/modal/buy-gems-modal.sass

@@ -87,3 +87,13 @@
     width: 80%
     top: 20px
     border: 5px solid gray
+
+  #or-subscribe
+    position: absolute
+    right: 30px
+    top: 420px
+    font-size: 16px
+    color: #eee
+
+    button
+      min-width: 182px

app/templates/play/modal/buy-gems-modal.jade

@@ -40,3 +40,8 @@
             
       div#close-modal
         span.glyphicon.glyphicon-remove
+
+      #or-subscribe
+        span Or 3500 gems/mo if you...
+        br
+        button.start-subscription-button.btn.btn-lg.btn-illustrated.btn-success(data-i18n="subscribe.subscribe") Subscribe

app/views/play/modal/BuyGemsModal.coffee

@@ -2,6 +2,7 @@ ModalView = require 'views/core/ModalView'
 template = require 'templates/play/modal/buy-gems-modal'
 stripeHandler = require 'core/services/stripe'
 utils = require 'core/utils'
+SubscribeModal = require 'views/core/SubscribeModal'
 
 module.exports = class BuyGemsModal extends ModalView
   id: 'buy-gems-modal'
@@ -22,6 +23,7 @@ module.exports = class BuyGemsModal extends ModalView
   events:
     'click .product button': 'onClickProductButton'
     'click #close-modal': 'hide'
+    'click .start-subscription-button': 'onClickStartSubscription'
 
   constructor: (options) ->
     super(options)
@@ -111,3 +113,7 @@ module.exports = class BuyGemsModal extends ModalView
     purchased.gems += product.gems
     me.set('purchased', purchased)
     @hide()
+
+  onClickStartSubscription: (e) ->
+    @openModalView new SubscribeModal()
+    window.tracker?.trackEvent 'Show subscription modal', category: 'Subscription', label: 'buy gems modal'