For those who buy back issues or just random issues it can really be confusing. I recall finishing DC comics from the 90's and having absolutely no idea what was going on because it was in the middle of some arc or event. Very new reader unfriendly. It means immediate dislike for the company.
It doesn't have to be a full page. Even just a paragraph can describe what's been going on. It's not hard and it's not a lot of extra work or space. Assuming that the price will go up a buck just because of a recap is ridiculous.
The lack of a recap is one of the biggest peeves for me. I thinks it's very bad business for a comic company trying to attract new readers.