Booking hotel - interesting breakfast inclusion issue

[AustinRacing]

So we booked via Agoda for two nights in a so called 4or5 star resort in Cha-am. I intended to include breakfast but mistakenly chose the other. Price difference was around 200฿ for the two nights for two adults and a child. At check in I realized my mistake so I asked whether I can change it with no success. Agoda informed me the same and said it’s at the hotels discretion. The price for breakfast was around 450฿ per person per day (around ฿2700 in total). 
Since it’s the same breakfast I just wonder  how they figure 2700 vs 200 based on prior booking  vs no prior booking. 
Incidentally we chose to have breakfast at a nearby place. 

[josephbloggs]

16 minutes ago, AustinRacing said:

So we booked via Agoda for two nights in a so called 4or5 star resort in Cha-am. I intended to include breakfast but mistakenly chose the other. Price difference was around 200฿ for the two nights for two adults and a child. At check in I realized my mistake so I asked whether I can change it with no success. Agoda informed me the same and said it’s at the hotels discretion. The price for breakfast was around 450฿ per person per day (around ฿2700 in total). 
Since it’s the same breakfast I just wonder  how they figure 2700 vs 200 based on prior booking  vs no prior booking. 
Incidentally we chose to have breakfast at a nearby place. 

No different than many other types of business. If I want to book excess baggage on a flight it is much cheaper to do it when booking my ticket rather than doing it at check in.

And never expect any hotel to do you any favours when you've booked via Agoda.

[KhunLA]

That's standard, cheaper if booked in advance.  Most are decent values.   My issue is, I don't want to have to wake, shower or mostly, eat a big meal before 10:30.  So we usually pass on that option.

[Fat is a type of crazy]

Assume you booked no cancellation - otherwise you can cancel and rebook. That is the standard way it works though so you'll have to cop it. Could send a friendly email to the hotel but not likely worth the effort