I have so far used Render Streets fantastic ONE subscription, but since I changed to Blender 2.8.3, my files don´t qualify for ONE any longer and I need the so-called ON DEMAND option, which means that the cost of 250 frames is 20 dollars(for this particular file) . - As I have several minutes of animation, the final cost of the project will amount to hundreds of dollars 
So I´m looking for a render service where you pay less for many renderings, than for one, if you know what I mean…, or at least a company with low prices for projects with xxxx frames.
I have found so far Raysrender which I want to check out, but does anyone know other render companies of relevance?