Starting out early in the startup journey it is likely that money is more scarce than time. So you develop a strategy to optimize the scarce resource - frugality, resourcefulness, creativity
After a company gets a large amount of funding, suddenly time is more scarce than money.
You need project X to succeed in the next month, and that might mean putting 2 to 3 vendors on the problem and picking the best result. Yes this is more expensive, but we're now optimising for time
Another strategy is acquisition of technology and talent, if you have 400 million in funding, then it makes sense economically to purchase a infrastructure team of tech company at 10 million, when you know it's going to generate 100M in value for you.
The best companies are ones where strategy is fluid and willing to adopt to the reality of dynamic resource scarcity.