Open with how you were doing something mundane when the “online payment” arrived.
Talk about how it solved some trivial financial non-emergency, or how many hours in your soul-destroying job it would take to earn it.
Conclude with a clear call-to-action to invite the Curious Kenny’s to send you a message for more information.
P.S. Repeat ad infinitum to attract fresh leads like bees to a honeypot!