If Steemit wants to attract advertising from Web3 projects, several key conditions must be met:

A sufficient number of active users

The production of high-quality content

Clear and tangible promotional impact

Data that demonstrates real service participation

These elements can certainly be achieved through Steemit.
However, the important point is that if the platform continues to rely solely on the current curation system—where there is little networking among users and most activity consists only of repetitive “mining-style” posting for rewards—then achieving these goals will be impossible.