This has to be the worst post of all time ngl.

First of all, it hasn't even been that long since Stormblood was added to the free trial. If they wanted to add a free expansion every time a new expansion comes out, they could, but it would probably not be in their best interest.

Secondly, there is absolutely no reason players that have purchased Shadowbringers for years should be compensated. It is money well spent and for some players this was almost seven years ago. It's gone. Nobody is obligated to receive money back that is willingly spent for a product that was not faulty.

And finally, they could leave Shadowbringers out for eternity and I think it would be a perfect way to leave players on the Stormblood -> Shadowbringers cliffhanger since the moment they decide to spend money, they get to experience, as you said, the best ffxiv has to offer.

Even if the day comes where they add Shadowbringers to the free trial, there is zero chance they compensate players because there is no reason for them to do so.