First, the two positive reviews are from people who are being paid to post. I can understand why they are on the defensive, because this place is sinking like the Titanic. If my company had a 60% turnover rate I'd be trying to do what I could to salvage my rep too.
While the negative review is extreme, it is a lot closer to the truth than the positive ones (which have been posted by what is essentially management)
Agency Entourage is not run well. The CEO is NEVER THERE. I had to laugh when one of the positive reviews said that the CEO was so present. They are more concerned with tearing down walls and expanding than actually making sure their employees are well compensated, or even actually having employees, because everyone keeps quitting. I was making around 22K while I was working there and had a college degree. I could have made more money working at McDonalds.
The "culture" of Agency Entourage is a facade. On the outside it looks like a cool exciting company but on the inside it's rotting. If you interview, ask why they can't keep more than one or two people longer than a year. Go on LinkedIn and reach out to former employees (which number in the dozens, which is quite sad for a company of under 20 that has been around for under 4 years)
Please look very carefully at the other reviews. The positive ones read like a PR release and the cons aren't actually cons, they are just opinions. They even gave the exact same scores for Culture & Values, etc. This thinly veiled attempt at trying to manage their bad rep among former employees is laughable. They also tend to go after people who leave or voice their opinions about the company (badmouthing to colleagues and peers, spreading misinformation), which is why you may not see very many negative posts.