I know that the subscription agencies are all the hype right now. But they don't come without shortcomings. Firstly, the requests aren't "unlimited". Yes, you can add as many requests as you like, but they promise to complete them every 2-3 workdays. If we take 22 workdays in a month, that leaves you with anywhere from 7 to 11 requests a month. More complex ones can take up to a week, so realistically you're likely getting up to 10 design tasks completed every month. There's also an issue with defining what a request even is. Changing font size can be a request. Is designing a mobile app a request, or do they break it down into 10 or 15 separate requests? But there's an even bigger issue. At their core, these agencies expect you to know exactly what you want. I believe it's the Designer's job to help figure out what's best instead of putting that responsibility on the client. In short, there are many subscription agencies. But I believe that there's a huge power in adding a dedicated Design Partner (such as myself) to your team.