They faced a long road ahead in 2016 when they moved home. They had the advantage of starting with an existing fan base- but those that knew them and loved them were all 40+ years old.
The Rams want and need to develop relationships with younger fans and that takes time. 5 straight winning seasons, a Super Bowl appearance and a state of the art stadium certainly helps. Games like the MNF game vs. KC in 2018
I guarantee hooked thousands of younger fans in one night. Those younger fans don't have deep pockets and can't buy season tickets yet. Remaining good and relevant will keep them engaged until they can.
Even little things like their website and social media presence are so much better now. I remember how embarrassingly bad their website was in St. Louis. And quality press coverage from people like Jourdan R. matters as well for sure.
It all adds up to a brand that is coming along very nicely.