I have Spotify Premium, and buy between 1-5 physical purchases a month usually, but it varies a lot.
I use Spotify as my testing ground, and buy physical to try and make sure the artist gets to eat.
Depending on the artist and label, I vary between buying on vinyl and CD. If there is a download code included, especially if it's HQ, I will usually get the vinyl. If the artist and label is the sort where vinyl will have no benefit, or there is no digital copy offered for free, I'll get the CD.
Anything new that seriously interests me I will buy on release. I tend to pick up a fair number of reissues each year, and there's usually an artist that particularly interests me and will get splurge purchased. This year it was John Coltrane and I probably added 30 disks to my collection in a month or two.
My overall financial budget is set not as a result of money but due to listening and absorption. I hate buying a stack of music and then not listening to it.