As someone who's from the Philippines, and is currently on holiday here, just wanted to chime in on the topic. Based on speaking to my friends here, we're well aware of the climate change situation. We've literally been feeling the brunt of the effects of climate change, for several years now (Temp. getting progressively warmer, typhoons getting more frequent/worse, etc.).
To be honest, the people here are just doing their best to cope with a really shitty situation. Filipinos typically try to use humour to help deal/cope with shitty situations. I think that's what the local marketing team was trying to go for , with this marketing campaign. I also think that a lot of people here would really appreciate any form of discount, even for smaller items like this.
Another thing I noted from discussions with my friends on climate change, is their frustration towards larger/more industrialized countries.They feel it's unfair that poorer/smaller countries like the Philippines have to suffer for the sins of much larger/well developed countries.
To be honest, I think you guys should vent your anger/outrage towards the companies(although tbf, McDonald's might be part of this list lol) /governments who are severely impacting our climate.