Money always buys speech; whether it is by allowing a columnist to write full time, affording the puchase of a computer to post on the internet, or giving someone the ability to travel to a public square.
Using money to purchase a magazine, newspaper, television, radio, or online advertisement is just another way that money helps people express their views.
In any case, I wouldn't be too worried about money changing people's minds, as it rarely does that.[1] Advertisements and the like usually serve to give voice to the views people already hold, and inform them of things they were not aware of. An advertisement will never convince people to buy things they don't want and don't need; if you disagree, please go and try to sell a bad product, and we will see how well your 'mind control' works.
Using money to purchase a magazine, newspaper, television, radio, or online advertisement is just another way that money helps people express their views.
In any case, I wouldn't be too worried about money changing people's minds, as it rarely does that.[1] Advertisements and the like usually serve to give voice to the views people already hold, and inform them of things they were not aware of. An advertisement will never convince people to buy things they don't want and don't need; if you disagree, please go and try to sell a bad product, and we will see how well your 'mind control' works.
[1] https://en.wikipedia.org/wiki/The_Righteous_Mind