In the majority of the soccer world, sure. In MLS and specifically RB, it's not. What's the benefit? You get some GAM? Maybe they can use that to bring back Caden Clark again!
I only see the benefit of selling players* once they use up every other avenue to improve the team. (Tyler Adams GAM and the 3rd DP slot.)
*Good players. Please sell Klimala ASAP... but even he doesn't deserve Russia.
good teams use GAM to allow them to subsidize transfer fee related the cap hit for non-DPs. Maybe we are smarter now but lets not pretend Philly wasnt able to create space in their roster from generating over $1.5mm of GAM last year. And without GAM from sales you can't trade for Lewis Morgans. We just have to use them on guys that will actually...play and not someone coming over on loan