anchor.diff:  
       if fOfferToDemandCache.TryGetValue(BidKey, OfferToDemandCache) then
       begin
  -      Result := (OfferToDemandCache = NOT_REACHABLE_DEST_VALUE);
  +      Result := (OfferToDemandCache <> NOT_REACHABLE_DEST_VALUE);
         if not Result then
           aBidBasicValue := NOT_REACHABLE_DEST_VALUE
         else
  
positive.code:     if fSerfToOfferCache.TryGetValue(BidKey, CachedBid) then
      begin
        aSerfBidValue := aSerfBidValue + CachedBid;
        Result := (aSerfBidValue = NOT_REACHABLE_DEST_VALUE);
        Exit;
      end;
    end;
  
negative.code: 
    {$IFDEF WDC}
    if CACHE_DELIVERY_BIDS then
      fSerfToOfferCache.Add(BidKey, aSerfBidValue);
    {$ENDIF}
  end;
  
  