According to the title and post before you edited it to reflect the "new policy" after I made my post, there was no language in there that would indicate a chance of a change in price. In fact, your title stated clearly that prices would be frozen throughout this year. Not a personal opinion or thought, just facts. Your post clearly stated 5 books for free through 2017.
Also, there were no signs and the guys controlling the line made NO mention of being able to go back in line to get more signatures. If the policy of being able to get back in line to get more signatures is true, then you guys choosing to omit this publicly is very unethical and just another case of trying to squeeze every dollar from collectors.