Heimdall.pm provides all its services for free, forever. If you wish to support
Heimdall's development, you can do so by either donating money
(not yet, I'll think about that).
…or you can simply use
heimdall.pm as the address instead. OpenAlias will
find the right wallet address for you!
Currently, We've got around 250€ of expenses per year (200€ for the servers and the rest in domain names). Any help is greatly appreciated ♥