Normally things had to be the way you describe and have nobody to need such services to boost his post. On the other side the fact is that not all users are equal in steemit. There are users that have steem power and vote power and users that do not have. People with that steemit power make $100s on whatever they post or they curate, regardless if it is good or bad. On the other side all the other users especially the minnows earn almost nothing. I find every day amazing posts of people with little steem power that end with a couple of dollars, have very few views e.t.c. because they do not have the power to make their post trending or popular and have many more people to see it and upvote. So here is a real problem because steemit users are not equal in the steemit environment and very few have the money to buy Steem and steem power. Services like the ones you describe in your post may help them a little and give them the satisfaction that earned something for their hard work. I am with you, that the ideal would be as you describe but when you have not any other choice then you must do something ...