That is not the qestion, so the answer is non sequitur. To summarize the actual question, if you pay for three 20kg bags, are you allowed to check in two 30kg bags, or are you forced to check in a third (possibly empty) bag? I found one post on Reddit that indicates Ryanair forces you to check in a third bag, but the OP and I are wondering if that is really true since I don't trust Reddit.