At 3m (10ft) attenuation is NOT an issue. TOSLINK was designed to be used with very inexpensve extruded plastic "cable".
Of course, as with ANY basically simple concept there are snake-oil shysters who will sell you something at 10x or 100x or 10000x the price with the completely baseless claim that it is "better".
The whole issue of "jitter" appears to be a relic of the early days of very simple consumer digital audio. No modern digital audio uses the raw derived clock from the digital stream. All modern consumer gear (and all modern commerical/broadcast, etc. gear uses local, crystal-referenced re-synchronization.
Yes you will find audiophools even here in EEVblog Forum who defend the baloney. As with all audiophoolish concepts, we have never seen any objective proof of the myth. Note that even the longest optical fiber connections (undersea cables) are thousands of miles/kilometers long in the harshest of conditions with very few booster/repeater amplifiers. You could count the number on one hand. Surely if "jitter" were a problem, you would not be able to read this message (or any of the other billions on the internet.
Essentially, ALL of the "internet" is connected through undersea optical fiber. Satellite communication has horrible latency because of the altitude of the geosynchronous Earth orbit. (around 500ms full duplex). Anyone who has done live television via satellite knows that you must keep an offset program clock that is ~500ms ahead in order to hit your time slot properly. (Been there, done that, have the T-shirt) You can see this every day on international news broadcasts where it takes an uncomfortably long time between when the local news-reader (in America "anchor") asks a question of the reporter out in the field on the other side of the planet replies. You are seeing the combined latency in both directions.
Certainly, there are glass-fiber TOSLINK cables (and connector adapters from TOSLINK to proper glass-fiber). They are commonly found in commercal operations where they use already-existing fiber cables, and/or where they are in large plants where they have to send the signal over distances too long to be reliably sent via dirt-cheap extruded plastic "cable". But that is because of attenuation in the plastic waveguide and has nothing to do with "jitter". If we can see absolutely flawless video which has been encoded into digital, send thousands of kilometers and reproduced on your TV screen (or smart-phone) with zero artifacts, why do we still believe in the myth of digital "jitter"?