anchor.diff:  $(document).ready(function(){
     if($("#user-subscribe-container #spree_user_subscribed").is(":checked")){
       $("#user-subscribe-container .user_type").show();
  +    if($("#user-subscribe-container .user_type #profile").val() == "Me Interessa Apenas Comprar"){
  +      $("#usertype_seller").attr("checked", false);
  +    } else if($("#user-subscribe-container .user_type #profile").val() == "Me Interessa Apenas Vender"){
  +      $("#usertype_buyer").attr("checked", false);
  +    }
  +  } else {
  +    $("#user-subscribe-container .user_type #profile").removeAttr("value")
     }
   });
   </script>
  
positive.code: $("#user-subscribe-container .user_type input[type=checkbox]").on("change", function(){
    if($(this).is(":checked")){
      if($(this).siblings("input[type=checkbox]").first().is(":checked")){
        $("#user-subscribe-container .user_type #user_type").val("Me Interessa Comprar e Vender");
      } else {
        $("#user-subscribe-container .user_type #user_type").val($(this).val());
      }
    } else {
      if($(this).siblings("input[type=checkbox]").first().is(":checked")){
        $("#user-subscribe-container .user_type #user_type").val($(this).siblings("input[type=checkbox]").first().val());
      } else {
        alert("Pelo menos um deve estar selecionado!");
        $(this)[0].checked = true;
  
negative.code:     <%= label :spree_user, :subscribed, t("spree.chimpy.subscribed_label") %>
  
      <div class="user_type" style="display:none">
        <input type="hidden" id="profile" name="spree_user[profile]" value="<%= @spree_user.profile %>">
        Tenho interesse em:
        <input type="checkbox" id="usertype_buyer" name="usertype_buyer" value="Me Interessa Apenas Comprar" checked="checked"><label for="usertype_buyer">Comprar</label>
        <input type="checkbox" id="usertype_seller" name="usertype_seller" value="Me Interessa Apenas Vender" checked="checked"><label for="usertype_seller">Vender</label>
  