Im an IOS user and just spent 100 dollars (maybe an hour ago?) supporting this game. Ive spent well over a $1000.00 since I started playing 10 months ago.
If this was available for IOS I would literally buy it as many times as possible (I've heard 3 times is the max) and and then use the IOS gift cards to buy even more crystals.
With the shard shop currency and crystals, I'm viewing this as basically a free 150 dollars worth of stuff for android users. Thats pretty significant. Will it stop me from being able to beat everyone in my arena every day, or affect my game play in any meaningful way? No.
But its annoying. It devalues my investment into the game. Will I quit? No. Will I consider going F2P? No.
But I'm annoyed. And an unhappy customer is bad for business. There needs to be some sort of IOS exclusive to balance this out. Fair is fair.