Self-custody: totally agreed, it’s best for many. Piggy is optional for those who want a simple, lock-and-leave habit to keep some winnings from boomeranging back.
And still, I don’t understand how this service could attract Bitcoin users. What’s the advantage of sending sats to your address instead of sending them to my own timelocked address? Any neural network can explain how to do it, or even help write a script to automate it. The days when this required technical skills are over.