I like your game, Plarium, but you need to stay in touch with your player base. 

The reason Telerian Summer Trials is failing is because your rewards are, quite frankly, trash. Sorry, anyone capable of farming Dragon 25 is not doing it for a chance at 300 Energy after a month. 5* chicken for Ice Golem? 50XP Brews for FK 25? Just goes to show how little you know about the needs of your players. 

And now, to correct the fiasco that is the poorly designed event, you offer us to pay 29.99USD to get energy for said event? I get it, it's cheap energy, use it wherever you want, but you marketing it as the Telerian Trials Offer really makes it look like you expect us to pay for your flawed design. The event is a failure, sorry. If you really want one that would work, either lower the dungeon levels or increase rewards because I don't know anyone who farms Ice Golem, and they are not starting for a chance at a 5* chicken.