! That answers the question I had on another post. So it sounds like it doesn't take a hit on the grade at all.
Technically the sticker is more like a cling or they use very little glue to hold it on. It would probably release over time regardless.
MedicAR - it is kind of nice to have a digital version. Instead of dragging a ton of books around to read I can have them on my mobile device or is a way to share within a family. My daughter reads Avengers Vs. X-Men, I get the digital codes. No need to buy several copies. What sucks about the codes is Marvel (again I can't speak about DC) feels that every version including the high-priced variants (that are clearly aimed to the collectors) needs one.
Like Kenners pointed out, I too have a book that I'd like to see the cover too - and paid a little cash to obtain. The book has a bit of wrinkles around the staple that I was wondering if pressing would fix - but I don't want to necessarily sacrifice the sticker in exchange for a few more points in the grade.
Finally as aman619 has pointed out there is no value in slabbing unless you are willing to sell, especially modern books. Regardless that in doing so my book could see a little bit more light of day and can be enjoyed instead of hidden in a box or safe. That is the financial point of view and while there is nothing wrong with his comments and how he does his collection - that isn't how I roll.