A guest just made an alteration request on the calendar, the original date was a perfect fit and now they wish to arrive two days later making it harder to get those days occupied. Plus they wish to stay one more night than previously and they will pay less than originaly because of the price fluctuation. So I will lose at least 3 days of earnings because of this.
Don't find documentation about how the hosts can defend themselves from alteration requests: either they accept the new reservation (even if it's not good ) or they suffer penalty in declining it. Did not find a way to update the prices on an alteration request. Think alteration requests should give the opportunity to the host of updating the price as up as the original price agreement between both parts.
It's like this : as a guest I make a reservation for some host on the calendar and accept that original price. Then as guest again, I'd look from time to time if the host is making price changes on the calendar and at the last minute ask for an alteration request. The guest would leave the host in a position of having to accept the change in reservation or having a rating penalty on airbnb.
Many hosts fluctuate their prices when the dates are becoming closer, so I think there should be some information about this kind of situation.