I originally found StreamFX just to get a basic blur video filter, which isn't available in OBS. I was very happy with this plugin for that purpose a year ago.
There are compatibility issues with OBS 28+, so I've given up on StreamFX for now, and settled with a workaround in vanilla OBS: dramatically downscaling and then upscaling the video source, with bilinear interpolation.
The Patreon business model doesn't really make sense for software dev work, in my eyes. Either the output is freeware, or available as a commercial product.
I could probably invest a few hours to build it from source myself once there's a stable v0.12, but that's a bit annoying and not feasible for most users.
Hopefully things come good soon, but it all seems a bit stagnant and toxic here at the moment.