Earlier quoted context omitted.
It's easy to presume that sunk costs should have no weight when considering the relative value of different options. For many endeavours a certain amount of investment is required before returns are seen - investments in time and money in particular. For this reason there is almost always a cost to be considered switching between endeavours. So, while I agree that throwing good money after bad is a silly thing to do,…
| For many endeavours a certain amount of | investment is required before returns are seen Compulsive gamblers tell themselves the same things. What is really needed is a objective view of the situation.
I definitely did not advocate gambling money away, but rather that "an objective view of the situation" requires you "to understand the impact existing investment has had on the road to profitability."
In a follow up to another comment in this thread, I specifically call out the difference between gambling, where (usually) any investment so far has no impact on future earnings; and investing (in particular investing in startups), where the time and money invested so far can have an impact on future earnings.
To be concrete, the next spin of the roulette table has no correlation to the amount of money you won or lost on the previous spin, but your chance of selling an app on the app store in the next month is directly correlated to how much of the app has been written already.