I think there are two different types of advertisements. For instance, there are members of STEEMIT who have associated websites that are all about commerce. I have no problem with that, in fact commerce, exchange of good and services, has already begun and is being transacted in STEEM!!!!! Peer to peer transactions are at the heart of any crypto-currency. I believe this is a positive development! If you are referring to advertisements like on Youtube where the ads are imposed upon the audience I am firmly opposed. If a large corporation wants to join STEEMIT and post about their wares, let them earn their following, no harm in that. just my thoughts. I did write a blog recently noting the beginning of commerce and its positive development. https://steemit.com/steemsilvergold/@handofzara/beyond-the-reward-pool-real-commerce-and-wealth-creation-in-steemsilvergold