Quoted for reference.

It is forbidden to incentivize posts in your thread. Also known as ANN Shill bumping. It is considered as tagworthy by DT as well. Possibly the account(s) associated will also get banned from the forum.

Because you are creating fake buzz around our thread where people are coming to see it every second because it is being bumped in a shady manner. This is a good method to "Trick" investors into thinking that the project has a lot of potential while in reality it might not be so.