Congrats, it looks great! How did you get the testimonials? Reach out to "power users" (based on usages numbers)? Or did you specifically recruit artists to your platform?
Yeah, I think one of the things I do that - perhaps - many people don't, is that I email everyone who signs up. or at least I did for a long long time. Not sustainable anymore.
Now I email everyone who takes a paid plan.
But yeah to answer your questions I just email everyone like a human being. Not like some marketer gasbag. I build relationships, make sure I'm on point when someone has an issue, and then just ask them for a testimonial.
All the testimonials on there just are are legit paying customers.
I think this is the essence of the much-bandied "do things that don't scale" advice. Scaling inherently involves abstraction and generalisation, engaging with individual human beings can generate much clearer insights until it becomes impractical (scale being a forced issue).
So much this! I'm one of the people that appreciates seeing "behind" the product very much :)
If you feel that a real human person is behind all that, and not a faceless company, you're also much more likely to share feedback. (Nobody would share improvement ideas for Windows with Microsoft, since you can be sure that those go straigth to /dev/null (or, more appropriately, the recycle bin).)