Spot on mate, as you continue to play they also give special offers for new cards & gems to entice you along the way, I've been very tempted already. The difficulty has already started spiking for me, making it quite challenging and making those special offers look even better. Seems to have good ingredients for a successful mobile game in my opinion.
Also, agree on your whale post. The other game I play has some serious whales who must have spent upwards of $20,000 each on it. Whilst that seems crazy for most people, it's definitely happening. Money isn't a problem for some of these guys.
Off topic - Are you mates with Whiskeyjack?
AB1 Price at posting:
7.9¢ Sentiment: Buy Disclosure: Held