They did indeed participate. (HT PETA.org)
While the Chicago Bliss photoshoot is gaining traction, Toronto Triumph players (pictured above) also did the cross promotion, most notably Alicia Bell, #10. Being outside in Toronto in December wearing solely those uniforms drew attention to say the very least.
PETA.org: Football Players Fight Fur With Bikinis
Guyism.com: Lingerie Football League players protest for PETA