Spending real money to play a game of chance for a reward.
"There are multiple lootboxes that can be acquired by a rare currency acquired mostly by spending real-world money"
"There is a slot machine game that you can access at any time, where you can spin to the point where you have nothing left. (I've never done that.)"
"There is more and more of this, but it's couched in in-game currencies that you can only get by grinding or being on constantly or spending real money."
"Certain locked behind chests. Game modes and mini games that replicate slot machines"
"While random chests can be earned by getting 20 stars (1-3 earned each level), they can also be bought."
"Pay in-game currency that costs real world money in order to access additional genetic traits which are otherwise inaccessible when breeding your Peridots"
"the 'life point lotus' is the only example of real world money gambling, but there are two other 'plants' you can buy to gamble on: 'social point flower' which costs life points (premium currency) and the 'simoleon sprout,' though it uses the common currency rather than either premium one."