Yeah, but the Boss DS-1 has been around much longer than the Digi pedals you're talking about, and it's so similar to the TS circuit that it's easy to take the 40 (or less) buck pedal and bring it to the point that it sounds much like a much more expensive pedal. They're everywhere, and stupid cheap.
The digitech pedals I've had experience with I had no reason to tinker with. They did their job. There aren't many pedals out there made my commercial companies that do lend themselves to mods at all. Most have them have been around for decades, or the mod has something to do with Truebypassing. The rest of them have simple circuits. Do Digitech have simple circuits? Is it easy to make them True Bypass?
Really, I imagine mods happen because people are unhappy about the sound of something, and they want to make it sound better. A DS-1 sounds better, and true bypassing feeds the 'true-bypass = better' myth out there. I've heard that Bad monkey pedal is good, sounds similar to a TS. Why mod it if it sounds good? The grunge pedal is another like that one.
Just my thoughts,