I have noticed the last few days if I keep 5 unused TH keys I do not get any at all the next day. The total remains 5. I am a gold member. This has happened a few time recently. Is there now a limit on number of keys?
Move your mouse cursor over the key counter on TH; the amount of daily keys it says you have, you must use on that day, or else you won't get those keys the next day. Only earned and bought keys can be stacked.