Yeah, I totally agree with tc... right now there is zero return whatsoever on gems. Weekly arena rewards nets you a couple artifacts and some potions. Most games dish out substantial gems to at least keep you going towards a summon or to re up on refills.
I do think the daily rewards thats give full energy are generous, but take a look at the past two events and check the returns on them. Looking at them as strictly cash value, the summons event required 200 USD to complete and the rewards amounted to two summons and not enough gems for a refill. I get it the event is optional, but it shouldnt be restricted to whales only. This is coming from someone who spent 700 USD in two weeks.
This new event requires (according to my progress) about 15 refills a day at 40 gems per refill, and the rewards again are a couple summons and not even enough gems to recuperate ONE energy refill. The more I think about it, the more insulted I feel.
With that being said, the game is pre release and I'm sure these guys are showing their bosses good returns, who then will hopefully let them reward us more. Topic creator is right, and if this game doesnt start rewarding us more, the game will simply wilt, and this unbelievable art and competitive setting will give way to some other strategy rpg that shows a bit more towards the player base. Perhaps they already have this in mind and we should be airing on the side of patience. .5% summoning rates and $30 for 11 pulls is a thing of the past when factoring in the returns we get from devs. It worked for games like this 4 years ago, but the landscape is shifting towards giving back, and making us happy to spend, not obliged to spend!