To be fair most, residential ISPs I've used do only advertise something like "up to X Mbps" [https://imgur.com/a/Qvp8i61 https://imgur.com/a/Qvp8i61] and some w

To be fair most, residential ISPs I've used do only advertise something like "up to X Mbps" [https://imgur.com/a/Qvp8i61 https://imgur.com/a/Qvp8i61] and some will have asterisks that further lead to documentation about things like "soft data caps" after a certain amount of TB transferred per month etc. Also residential ISPs generally don't even have SLAs so you could have days without Internet... probably also why they do not try to even hint at any guaranteed bandwidth. Depending on the situation, you might have none :)