What's the behavior that you're seeing? The behavior of the gigel rule is the same regardless of whether the initx rule is present or not.
CLIPS>
(defrule initx
(declare(salience 90))
=>
(assert (blabla 10)))
CLIPS>
(defrule gigel
(declare(salience 89))
=>
(printout t "test" crlf))
CLIPS> (reset)
CLIPS> (run)
test
CLIPS> (facts)
f-0 (initial-fact)
f-1 (blabla 10)
For a total of 2 facts.
CLIPS> (clear)
CLIPS>
(defrule gigel
(declare(salience 89))
=>
(printout t "test" crlf))
CLIPS> (reset)
CLIPS> (run)
test
CLIPS> (facts)
f-0 (initial-fact)
For a total of 1 fact.
CLIPS>