IT is very fine print, and even that may not tell the entire story.

For example, you may be given bonus points for using the CC at a grocery store, but what exactly does that mean. Is a Walmart Super-center grocery purchase considered a grocery store? Some CCs do not consider them to be so, and you lose the bonus because of that.

Another example may be a gas station. If you buy gas at the pump, you get extra points, but a candy bar inside the attached store does not.

In general, things like gift cards and cash equivalents usually do not count as qualifying purchases in the fine print but usually go through as such on the statement.
As always, YMMV depending on the CC you use.