[safety1st]

No. Trying to make money is something that all businesses do, not just monopolies. Having loss leaders is also something that many businesses do.

Here are behaviors that are fairly unique to monopolies: raising prices while degrading their product. Many businesses try to do these, but monopolies, who have no significant competition, are more likely to succeed. Sure enough this monopolistic behavior is what Google has just exhibited: by banning people who use ad blockers, they have either degraded their product, or raised the price (from $0 to the cost of YouTube Premium for those users), depending on how you look at it.

They can do this because they are a monopoly.