01 Custody
Who holds the money when affiliates get paid?
Here is where this page is careful.
Endorsely's pricing page says "Bulk Payouts via Paypal" and "No commission fees". It does not say whether the money passes through Endorsely on the way to your affiliates, or leaves straight from your own PayPal account. Their docs describe automated payouts and invoice generation, and stop there. So this page does not claim either. If it matters to you, ask them before you sign.
AffiliateRail's answer is on the page. It works out who is owed what. Then it logs into your own PayPal or Wise and pays them. The money leaves your account and lands in theirs. It never comes near AffiliateRail. That is why 0% is a fact about the plumbing, not an offer.