I had an ISP that tried that. At the time 100 Mbps was the top speed offer, I had a 30Mbps package. Could boost to 100 anytime with one click, but it was ~1 Eu

I had an ISP that tried that. At the time 100 Mbps was the top speed offer, I had a 30Mbps package. Could boost to 100 anytime with one click, but it was ~1 Euro per hour. Used it once lol They gave up on it, probably because no one used it. Maybe if the price was right. But technically, it seems easy to implement, at least on some network configs. But the fixed rate contract for high speeds is likely more profitable for the ISP.