One way to get variant comics is by following the social media accounts of comic publishers or artists. They might announce limited releases or special offers for variant comics.
It depends. Some people might think so if they don't have much interest or if the variants don't offer significant value. But for collectors or hardcore fans, they can be quite valuable.
One way to get variant cover comics is by subscribing to comic book subscription boxes. Some of these boxes might include rare or variant covers. Another option is to follow your favorite comic book artists or publishers on social media to stay updated on special releases and promotions.
I don't have the exact figure for you. Sometimes, the number of variant covers can change based on promotions or limited runs. Your best bet is to look up recent news or announcements from the publisher or check with comic book enthusiasts' communities.
A 'variant' in comics is basically a special or alternative form. It could be a comic with a unique cover art, or maybe it has some tweaks in the story or illustrations compared to the regular release. They often add excitement and collectibility to the comic world.