One can never know in advance if these things will snowball, as in Egypt, or quietly go bust.
The group that called the strike has 1600 members but so far only 60 have accepted the invitation. Then again, I'm sure many would not want Hamas to know who they are.
Palestine Press Agency is notoriously anti-Hamas so they will push even half-baked anti-Hamas initiatives. But from recent events we see that Hamas is very sensitive to any protest, so this bears watching.