Hey man, your art is great, but I bet you don't do it only for the money. It's nice to be rewarded for good work on here, but if you only focus on that, it will be sadly disappointing.
You have been doing well, gaining followers. Stay persistent and you will succeed.
You can try to encourage people to respond and engage with your post. Maybe ask questions, hold competitions or make a repetitive series that keeps people coming back!
Make friends and network. The real value here is working with people on projects. Do you do graphic art?