I would think that the heimishe singers who are making pennies as royalties would either opt out of spotify or come up with some proclamation that it is ossur to use it and it is just as bad as copying.
If so, foolishly, IMHO.
They are making pennies either way. Their main purpose is to get their name and music out there to get hired. Streaming helps their cause, and streaming will get me to buy the album. I certainly wouldn't buy it without listening first.
Fun question: How many artists are there who's albums you'd buy as soon as released without needing to hear it?
For me it is (in no particular order):
MBD
Avraham Fried
8th Day (for now!)
Nochi Krohn (weren't expecting that, were you?)
Kol Achai (I can dream, can't I?)
An Abie Rotenburg project (From the Golden Crown to Dveykus - I'll take anything)
I'm definitely missing some, but others that come close - Shloime Gertner, Benny Friedman, Shlomo Simcha.
Used to be on the list: Lipa.