I have received multiple rebates on the same item within different rebate periods but some users have reported Verbatim has a limit and gave them grief. Two or so should not be a problem.
The last time I got these they were MCC 003 made by Prodisc. That seem to be fairly consistent in the 100 stack.
I would go for these over Benq media any time, even with the rebate. Verbatim MCC is at the top of quality.