I think there’s a big difference between increasing your metabolism and losing fat.
You can raise your metabolism and gain fat real fast.
Raising your metabolism with increased calories, and trying to lose fat (not saying you’re trying to) is like trying to burn all the wood you have in a fire, then realizing adding more wood makes the fire bigger. So you keep adding more wood.
Then you’re like… why does this wood pile keep getting bigger?
I don’t think that the weight gain stops until you gain so much weight that you match the calories you’re eating then you stabilize. Or until you reduce calories.
I think if you want to avoid rapid weight gain, the best strategy is probably to increase calories methodically and slowly over time. Instead of just switching gears and increasing calories by hundreds of calories literally overnight.