I’m inclined to think workers who would have turned to payday lenders in the past to pay for groceries or a cell service bill might instead wait until after their next work day to initiate an instant deposit. It’s easier to do so in an app than it is to visit a payday lender, after all.
[0] https://www.pewtrusts.org/en/research-and-analysis/articles/...
I think part of it might be down to numeric intuition. If you get paid $250 a week or $1000 a month, that's the same amount of money, but $1000 is a big enough number that you think in terms of, "ok, $300 for rent, $200 for groceries..." whereas $250 per week makes you think, "hey, I can blow all of this at the bar because there's another $250 next Friday and I'm sure I can scrape up the extra $50 for rent by then". $50 per day makes it a lot easier to blow the money because you're only ever blowing $50 at a time.
And I don't want to make it seem like this is because poor people are stupid. I'm stupid. There are days when I reason, "hey, I can totally eat a pint of Ben & Jerry's today, it's just one pint, I can make up the calorie surplus some other day", but it just adds up in the long run and now I'm fat. And this is exactly the same intuitive gap that would lead someone to blow daily or weekly paychecks far more recklessly than they would blow a monthly paycheck. (Relatedly, I hear that meal planning is a good strategy for losing weight!)
Well, financial pressure reduces your IQ.[0] Poor people aren't "stupid people" but they can more easily make stupid descicions (and of course have no way to recover, creating a downwards spiral)
[0] https://www.princeton.edu/news/2013/08/29/poor-concentration...