Also, some of these wallets might add additional fee. While all these doesn't mean they're earning as much as others having their service paid, it was their very decision to support the community or make names for themselves and it may not be profitable for them but seeing it functioning well and helpful to the public is enough.

This also influences like minded individuals for supporting the project for free.

Also, some of these wallets might add additional fee. While all these doesn't mean they're earning as much as others having their service paid, it was their very decision to support the community or make names for themselves and it may not be profitable for them but seeing it functioning well and helpful to the public is enough.