Taylor Swift did do something a bit like this this for a previous tour - you could get early access to the ticket sales by doing various kinds of fan activities, including buying physical copies of her records, watching videos, and posting on social media [1]. People were kind of mad about it, although I think in part that was because the "fan activities" that gave you the best chance to get tickets were the ones that also involved buying things.

[1]: https://www.theguardian.com/music/2017/aug/31/bad-blood-is-t...