If you are ordering a package on a streaming platform such as Spotify, Tidal, or YouTube then you will be eligible to be paid out royalties by these platforms. How much you will receive will depend on which platform and what the royalty rate is that particular month.  How much you make back off your investment will also depend on the quality of your content and how much the fans share your music with others. The bigger the promo package, the bigger the ROI. The streaming platforms will pay out to whichever digital distributor you have used within 30-60 days usualy after your campaign has finished.