And that's only for people who run Steam, who are likely to have high-end cards. This is, it does not include PCs for office workloads or most laptops. Intel is at 9% right now in that Steam survey so the real number is much, much higher than AMD (and perhaps nvidia too). This makes AMD the third one in user share.
If we're counting integrated graphics in this, then AMD probably ain't anywhere close to being in 3rd. Between AMD and Intel, AMD's at around 35-40% of the CPU market (per https://www.statista.com/statistics/735904/worldwide-x86-int...), and most of those are probably going to be APUs or otherwise have an integrated GPU.
I can't find any solid numbers on the percentage of PCs with dedicated GPUs, but I'd be very surprised if it was anywhere near that figure.
> PC VIDEO CARD USAGE BY MFG during FEBRUARY 2022 - JULY 2023
> 15.93% AMD
> 74.69% Nvidia