Bought multiple copies of the most recent two Los Campesinos! albums; vinyl for me and then CD copies to give to friends/siblings. Tend to buy a lot of LC! merch and gig tickets to give to other people as well as my own stuff purely because I want to fund the band.
For my own personal use I bought 1989 three times. First I pre-ordered the CD, then when the digital version had three bonus tracks that weren’t on the CD I bought that too, then bought it on vinyl when that came out. I don’t feel particularly good about Taylor as a person these days since the “verified fan” bullshit, which is just rinsing people, so I pirated Reputation, and it’s fucking terrible.
I didn’t “buy” Run The Jewels 3 three times, but when it first came out as a free download I made a point of buying a t-shirt as a kind of gratitude thing, then a website accidentally listed the CD as the LP so I bought that hoping to get the LP at a CD price but didn’t particularly mind when the CD turned up, and then I just bought the LP recently anyway so I could have all 3 records on my shelf.
I tend to pirate most stuff, then buy a lot of stuff from bands I like out of a sense of goodwill.