I used to work at Stripe, specifically on Connect, and I want to point out one thing that's not quite accurate:
> and there’s also a transaction fee of $0.25 + 0.25% (in addition to the cost of Stripe Payments and other Stripe products)
This is not a per-transaction fee. That implies that the fee is per-payment. This fee is per-payout, which is the ACH credit (or debit rails transfer) to the account holder from their Stripe balance. It's not uncommon for the payout schedule on accounts to be at least weekly, so you have many payments worth of funds batched together into a single payout. The per-payout fee of $0.25 ends up being a lot smaller as a percentage in practice.
> and there’s also a transaction fee of $0.25 + 0.25% (in addition to the cost of Stripe Payments and other Stripe products)
This is not a per-transaction fee. That implies that the fee is per-payment. This fee is per-payout, which is the ACH credit (or debit rails transfer) to the account holder from their Stripe balance. It's not uncommon for the payout schedule on accounts to be at least weekly, so you have many payments worth of funds batched together into a single payout. The per-payout fee of $0.25 ends up being a lot smaller as a percentage in practice.