Depending on how much my starting bankroll is, if I started with no more than $50 then I will be happy enough to take $50 profit. But if I started like with few hundreds dollar, I cant be really happy to win $50. Although in fact $50 is something that can be considered as a good amount in my country but gamblers usually use their starting bankroll/deposit as the main reference to set a target on how much they want to gain with their deposit, not based on how much is the value of the winning in their country.
I think that OP is talking not about how much percent of deposit you win but about the cost of money. We can`t understand emotions of the authors here, when they call the sum they win. But if authors will write something like "i won my monthly salary" or will add something like "$100 is medium salary in my country" it would be easy to understand how big profit for them.