A Bot that Sells Lands and Another Selling Jewerly and Clothes! X(

There are bots everywhere in SL and this one is not spamming or doing something else just advertisement and selling lands!:

But he wasn’t the only one, there is another bot selling “jewerly and clothes” as you can see:

These are bots used for advertisement and but this could be real way to sell stuff?. I really don’t know but would be interesting to ask to the owners of this bots what they think about.