A common idea is that fans could get one of the “base” five stars that are in the generic banner, as after a year, giving all players a single copy of one of them seems like at least *something* of significance, and could benefit both new and veteran players (with constellation additions).
The thing is, Genshin Impact is so stingy with its drops that you could even gift every player 10,000 primogems for pulls, and that’s still not necessarily a guarantee that they would get a 5 star from a banner (you’re only guaranteed one every 90 pulls, and it’s only a 50% chance it’s the featured one you actually want).