I want to know the answer to the following question:
What was affected by the increasing use at Marvel of crossover stories between comic characters?
All the background I'm provided with is that "Marvel earned a great deal of money and recognition during the comic book boom of the early 1990s, launching the successful 2099 line of comics set in the future (Spider-Man 2099, etc.) and the creatively daring though commercially unsuccessful Razorline imprint of superhero comics created by novelist and filmmaker Clive Barker.". Is that enough to answer the question?
Answer: no