If it's remove by Google, then users will simply switch to browsers such as Firefox, Opera... Who do provide it
So this would mean they will lose their market share to competitors
So the negative financial impact of people not using a free browser outweighs the positive financial benefits of increased ad revenue from the percentage of people currently using Chome with AdBlock who will suck it up and continue using Chrome even with AdBlock disabled by Google? If the browser is free then wouldn't the negative financial impact be small, if it even exists at all?