This is the definition of an indie hacker. They take established products/tools and then strip them to improve one area and sell it onto other indie hackers at an 'affordable' price which requires you to sell your soul for $8 per month.
Imagine having 10 paying customers giving you $80 per month. You need to provide some level of support, deal with charge backs which can get you MATCH banned so payment processing becomes near enough impossible, update the product and market it too.
The trouble with a few hundred customers is the customer service side of operations. Indie hackers are lean machines and having to support a large customer base requires more tasks. Managing churn is also another problem area as you grow which generally requires product development. You quickly lose the indie hacker feels once you get to 50 customers I would say.
Imagine having 10 paying customers giving you $80 per month. You need to provide some level of support, deal with charge backs which can get you MATCH banned so payment processing becomes near enough impossible, update the product and market it too.