Rainhut provides Auto-Layouts for the benefit of both the artist and the end-user.
Artists - Only need to create one template instead of a template for every possible aspect ratio.
End-Users Only need need to chose from one template regardless of the aspect they are working on.
Auto-Layouts can pin and scale objects according to their location in a template for auto placement. Please see more information on setting auto-layouts in Rainmaker.
What about Frames? To avoid frame skewing, you can publish three frames to Rainhut for each design: square, portrait and landscape. So if an artists intends for their templates to be be universal, it is important to upload three version of their frames.
How to set Auto-Layouts in Rainmaker