How do these 'unlimited for flat fee' business models work? They can't have too many customers that actually use the service or they will lose tons of money. Are they playing with averages hoping that most customers won't use them much? They should be scared to death of people liking their service and using them.
All Time Design is a subsidiary of Spiceblue Inc ( https://www.spiceblue.com/ )UX/UI company in the US and India with over 60 designers. One of the top design agencies with top-notch designers.
Clients really like our designs and Most of them needed Graphic Designs for their marketing and other needs that's when we came up https://www.alltimedesign.com/
We have all our designers in-house and they are based in India and the cost of Labour is very less.
We recently launched All Time Design and we have 19 paying customers and growing every day. We do have another plan https://www.alltimedesign.com/design-in-a-day/ (Most of our Spiceblue customers opt this plan)
By assuming that most users are satisfied with simple quick graphics and by using tools that auto generate variations of a design. Also, don't expect more than 7 graphics a month. While you can make unlimited requests, they only work with ONE of you requests at a time.