Exchange rate between real money and in-game currency disguises the real price of items.
"Outside of gameplay, the in-game currency is gems. These can be earned by winning levels but can also be bought with real money"
"Yes, BUT!!! this is another thing i'd love to have a "kind of" review option on hbdhfbhjs CRK is VERY generous. The premium currency is given out for free all the time, and you receive PLENTY of it through normal play. Spending money is NOT required."
"Numerous in-game currencies of different value, some of which are not available except through real money transactions"
"The in-game currency 'skulls' (which can be used to purchase temporary effects during a level of gameplay) can be bought in large batches (thousands) via microtransactions, or very slowly accrued in small amounts (random chance of ten at a time per kill) through gameplay."
"You can pay for "pieces" of the in-game collectables, which you can also get via gameplay."
"You can pay for "loyalty points," which can be redeemed for real-world gifts such as plane tickets to a tropical destination."
"Yes, and it constantly advertises bundles of premium currency. After a certain point it starts filling up a "piggy bank" with premium currency after every level, and pesters you to pay to get that currency every level once it has filled up."