They basically are giving you an interest free, two day loan.

That can be a trap for anyone who starts to rely on that, because at some point they aren't getting it two days "early", they are simply getting it on time, but two days ahead of when their company sends it because they will have become accustomed to the earlier pay date and their finances will reflect it. So it may be a good feature in a pinch and as a one off, but ultimately it just means you will probably get used to payday being that two days "early".

Its basically just an interest free pay day loan. The history of (and anticipated future) direct deposits is the "collateral" here. And the banks are in a convenient place to "garnish your wages" to cover any outstanding loans and make sure they get paid back first before you spend anymore.

Honestly, it is telling and concerning that "getting your paycheck early" is even a marketing gimmick used by banks at all. If people are living not only paycheck to paycheck, but paycheck to 2 days before paycheck, that is a very dangerous cycle to be in and one that will crash eventually

One of my banks already does this with any recurring direct deposit.

It says "able"... does not mean that they will or can.

For example, my paycheck shows pending for about two days in my checking account. They would make it available immediately.

Now when they do that, and the transaction is reversed and you spend that money, you will get penalties and fines.

I would not take that risk. It sounds more like a gimmick.

They can see the pending transaction before you do. Also they know there is a long history of that deposit on that date.

They won't do it if you keep a low balance, bounce checks, or have irregular deposits.

It's because the bank already knows the money is coming from the direct deposit process, which is triggered multiple days before the actual pay date.

Direct deposit of paycheck is usually set to start processing a couple of days before payday, so banks often have information early. It’s dangerous to rely on the money being available early because glitches happen occasionally. I have no desire to pay overdraft fees, so I have my bill payments set for a couple of days after payday so I can confirm the funds have been deposited.

Banks are alerted of an incoming deposit and make the funds available that day.

payroll is transmitted to paying bank a few days before payday, hence your employer has committed those funds to be transferred on payday in the automated clearing house (ACH) system. Your bank, the receiving bank, can see those pending transfers in the automated clearing house system, hence it's not a big risk for them to fund your account a day or two ahead of time especially since most transactions people make take a day or two to process anyway.