The license can be found here: svgbackgrounds.com/license

Summary: You can use graphics in personal or commercial projects, you cannot use the graphics as the primary integrity of your product, you must provide attribution (svgbackgrounds.com/attribution)

And before anyone rips off my head, attribution can be placed inside commented out code, so it doesn't need to take away from your design.

Glad I shared at the right time :)

Hey great eye. I generally design in Illustrator with a plugin by Astute graphics that allows me to reduce unnecessary anchor points, run the exported SVG through SVGOMG, and then spend solid time hand coding each background in VS Code with the SVG extension by Jock that let's me see a live preview. Then on the actual site the customizer script I wrote will catch some attributes that aren't needed and remove them, but it's far from perfect.

Tell me more.