If you go to paid ads (I hope not), please make them all artwork related. (3D, 2D, whatever.) And only stationary stuff. No videos that hijack the screen. I've stopped visiting various sites because of having flashy things yakking at me and refusing to go away. (The only place a video is acceptable is if I'm previewing a product I'm thinking of buying, and then it'd better be about the product.)

a good start would be giving us back what we org had, from the cheap few buck one, to the higher priced banners and email blasts

As Rowan54 said, I also think it's important for you to be careful with the type of advertisement, and demand themes related to art. This, for me, is a big difference between you and your competitors. In the Daz store, for example, you see generic Google Ads ads everywhere, ridiculous, especially for premium users. By the way, allowing premium users to hide ads could be an added attraction, just ideas, PolyHaven did something like that.

Maybe some electronic Hardware Ads (CPU , Graphics cards, Motherboards,...etc), something to add-up to the art-related adds but is profitable to you at the same time & won't ruin the general theme of Rendo.

I agree with everything said so far. Nothing flashy. All art related. But please don't do away with the free ads.