I think it should be possible to toggle the Founder Badge off on your channel, I'd love to show off my custom sub badges to new potential subs but most of the people subbed have the founder one.

It makes sense to have the Founder Badge when you have heaps of subscribers, but when you have around 10-15 active subs per month most of them are going to have the Founder Badge and not your custom Sub Badge... Again, streamers should have the choice to either keep them active or disable them and re-enable them sooner or later.