At the moment, there are about 1400 accounts with over 10,000 SP and the higher prices climb, the less likely there are going to ever be many more than that as many are not going to pay 100,000 for 10,000 Steem
True for individuals, but not for businesses. We get enough eyeballs and wallets here, and big brands will pay big money for a loud voice.
I actually originally added a line of corporate investment in but deleted it because for many, it seems far-fetched. I think that as the numbers start to build, some businesses will take the plunge early just in case, especially as other advertising channels are closing. If you think that the crypto space is full of cashed up, Brave browser, adblockers - they will want access somehow.