the short answer is GREED.... corporations are only interested in profits. The global economy is changing and the FIAT world is starting to notice that crypto has benefits that far outweigh the short term volatility risk.
yes, I agree with your opinion
I think it is unlikely that a big company works with bitcoin, if it does not generate huge profits,
an I'm sure big companies will succeed again, and crypto will be even better.
It's business at the end. Everyone focuses on multiplying their respective revenues. Crypto especially bitcoin being the first currency with high values and it keeps moving upward, the business whales know that they need to utilise this situation investing or manipulating the high value to grow their revenue by any means of accepting bitcoin either as a payment method or investing the bitcoin earned thriugh payment method into other crypto currencies to multiply it's profits. This is entirely a business move.
Always a business emphasis on looking for current trend loop hole to attract customers towards their business to increase their business revenue. This is why the top companies mentioned above accepts bitcoin as a payment method.