Guess it's a personal preference thing, plus people being busy and having limited time. For me it was more interesting and sticky when more people posted their music, either their personal recordings with backers or recordings of their performances or just noodling. I have all the gear I need and don't do my own mods, so that part of it doesn't move me much. It's more about musical interaction. The days when one person would start something on a backer and others would add their interpretation were good times. But granted, that requires some time and energy.
Good that you're asking these questions. Hopefully others will chime in.
helliott in Hamilton
Guitars -- 2 PRS CE 24s 85/15 pups, PRS semi-hollow CE 22, Fender Baja Telecaster; Gibson Les Paul Standard; 80s Strat updated with custom 69 pups, Anniversary Strat with Fat 50s, Epiphone Sheraton re-issue; Yamaha 5-string bass; Yamaha TBS 6 and 12 string acoustics,Takamine acoustic, Fender nylon string acoustic
Amps -- Mesa Boogie Lone Star; Boss Katana 100, Peavey Blueamaster 2x10, Line 6 Helix
Pedals etc: Mosfet Full Drive 2; Ibanez Tube Screamer; Fairfield Barbershop OD, Diamond Compressor; Voodo Sparkledrive, Boss Digital Delay DD7; Boss TU2 Chromatic Tuner; Cry Baby wah