If people telling you.

I don't have money for your subscription, sorry.

This simply means:

I spend my money on other subscriptions not on yours, sorry

What can you do about it?

Check out the other subscriptions of this person.

Ask this person what could make her join yours.

Most of the time you need to beef up your paid tiers with stuff your audience really needs (talking: solution, product, course, live coaching, first chapter of your book, access to you, access to others... you name it)