p.p.s. Just for maximum transparency, as this hasn't come up before: I don't take any money or anything else from companies. I've occasionally received offers to pay for promotion, but turned them all down.
I don't think people want info accounts or info sites like fedi.tips to turn into product shilling systems. That's another reason for the donation links, to keep the sites and account independent and focused just on the needs of Fediverse members.