RenderHub has 55% starting royalty but with 200 models uploaded you're easily at 70%. 3DExport has 70% fixed royalty but low number of clients (for last 15 days I've notice some increase there). They also decrease royalty to 50% during their sales campaigns (e.g. your model is $10, discount is 50%, royalty 50% and you get $2.5 only). Anyway, you can sale of any of your models individually at any time. TurboSquid is at 40%. FlipNormals are also low on clients. CubeBrush too (PayPal doesnt work, credit cards only). Envato works under Shutterstock but also not good + verification process is hell + extremely annoying with spam emails. SketchFab also have annoying verification process + your models must follow some quality standards. So, use all you can find. Don't use exclusive options and set prices in a way that worst royalty platform have the biggest prices.