Of course not, most coupons may be used only by you when you received them directly from Zenmate. As the Zenmate coupon includes your User ID, it cannot be resold or transferred in any way.

It depends! Normally, the percentage that you can save with that Zenmate Coupon will be shown right on the page, so you can see if it is applied sitewide or not. However, once you are not sure, try it right on their's products you want to buy.

Usually, Coupon Stacking is not allowed at Zenmate. However, the store will surely give out notice if available.

Yes, it has ever. It may not be available now, but it is completely possible for loyal customers of Zenmate to get it by tracking all of its promotion programs.

Shoppers can get coupons for their first purchase at the store. However, it is not all the time, sometimes, they cannot apply a discount on items selling out or items not contained in the promotion program. It depends on the time you shop at Zenmate.