Pressing rosin leaves you with a product that still has to be decarbed, to get full potential. Fine if you smoke it, but less than optimum for edibles in it's raw stage.
So does RSO after the solvent has boiled off. That's why it's left on the heat for a while afterwards. Temperatures of 230°F / 110°C are needed for decarboxylation.
I put mine in capsules. The rosin and oil need to be warmed so they will flow easily. I heat the oil and rosin to 230°F / 110°C until decarb is complete, usually 15-20 minutes. I pour the oil into the rosin, mix it and let it cool to about 150°F, then use a syringe to load the capsules.