Forcing you to sell at the same price as on steam when customers will be downloading from steam servers anyway is not sketchy but very fair.
As a developer you could set the game price on steam to a high number and sell keys on your own site for cheaper. Anyone who buys a key then used steam resources to download it. The dev keeps the 30% since its not a sale through steam. Yeah id like free file hosting with terabytes of bandwidth too please.
If you sell the game yourself and provide the files, you can set lower prices. This is fair and valve doesn’t restrict that.
Self refers to oneself as in, a person. I never associate selfhosting with a company which runs their own servers. Technically they do self host but is it a company asking questions on an online forum and referring to itself as oneself? Is a company a person? What is a company even? Philosophical questions we dont have time to discuss.
To me, self hosting means a person is self hosting things. Some have racks and use 1kW of power on idle, some have micro servers. In any case, just one paragraph explaining what you have at the top of a post is sufficient to get the point of what you know across.
Id say a more important distinction is persons who self host software only (VPS) and those who do hardware as well.