I can confirm @SGGhostRiders’s findings.
Changing account to one with many owned products has high (2.3GB for me) VRAM usage, changing account to a new one with few owned products has low (~0.1GB) VRAM usage. This was tested on a clean up-to-date system (meaning likely no external factors affecting result).
I own a fair amount of games and a fair amount of unreal engine assets, so I do not know which is impacting the memory leak.
On a laptop with Intel integrated graphics (tested both old Intel HD graphics, and Intel Iris Xe Graphics) the VRAM was always low, no matter the account. Meaning that it probably does not happen to “shared video memory” only on dedicated video memory.
On a laptop with 2 GPUs (Nvidia Optimus), the VRAM was always low (~0.1GB) with the intel integrated GPU, and with the discreate Nvidia GPU it had high VRAM usage with my account, roughly the same amount (2.3GB) was used across different setup with my account.