Link says, "Spray.Bike paint is a dry matte powder coating that doesn't drip, dribble or misbehave in any way and gives a deep thick layer with just a single coat."
IDK what that means, per se. Obviously it's not what is usually meant by power coating, which goes on as an electrostatically deposited dry powder that is melted/fused/cured at high temperature. I can hazard a guess that it contains one highly volatile carrier component that evaporates before the paint hits the surface leaving it semisolid rather than liquid. It does sound better than the common hardware store rattlecan stuff.
I'll add that I've never seen a good hard durable paint surface come out of a spray can. It might exist, but I haven't seen it. I have used automotive two-part polyurethane paint that does do a great job, but that requires a compressor, HVLP gun, paints, solvents, eye protection, respirator, and a place to do it.