You would be better off pirating all of your music and buying just one piece of merch from an artist. These rogue foreign licensing agencies provide no real value, and in fact are functionally illegal and unrecognized outside of Ukraine. It's also highly unlikely much money flows back to the artists.
https://law.stackexchange.com/q/499, https://archive.is/EZ2U3
I was going to say that merch fulfilment isn't free either but I guess that's your point. A few dollars from a $50 t-shirt is significant compared to the infinitesimal fractions of a penny from streams.
Ah, gotcha thanks for the heads up! I read that this site was legal and assumed that they managed to stay aboveboard by offering artists slightly more than they could get from Spotify or other streamers.
But seeing that they're operating under dubious licensing, it seems much more likely that this isn't the best way to go.