Making callin.io sustainable: paid advanced features

I had a feeling a post like this might appear eventually, but it's also completely understandable and anticipated. Revenue, in all its forms, is crucial for projects to sustain themselves, and I certainly want callin.io to continue operating.

Beyond what's already been discussed about the API (I concur that the API should remain accessible. APIs enable us to build and innovate with new concepts and experiences; restricting access via a paywall would stifle many creative projects that could be developed using callin.io, ultimately causing more harm than good by limiting that creativity).

In addition to that, my thoughts on this topic include implementing tiered pricing based on geographic location, similar to practices by companies like Adobe and Netflix. For instance, I pay $57 for my Adobe subscription, while some colleagues in different countries pay only $15 for the identical plan.

I recognize that paying $60/month might be challenging for many. Therefore, finding a method to accommodate users from diverse economic backgrounds globally should be considered.

Pricing often causes concern, which is completely understandable given the current economic climate.

Personally, the last thing I need is another subscription payment. I'm looking for a way to use the tool that allows it to cover its own costs by generating income, as I'm an individual user, not a business.

Could you please suggest alternative methods for utilizing the tool to offset its expenses?