It is an interesting phenomenon that the race is selling out as fast as ever before, and a great sign for marathoning. It not only demonstrates the increasing popularity of the sport but also suggests that more people are hitting the standards to get into Boston. If the BAA considers the trend toward earlier sellouts a problem requiring action, it could do one of two things. First, expand the field beyond the 25,000 participant limit. The 100th anniversary race started a record 38,708 participants, so the precedent for a larger field is there. The alternative would be to raise the standards and make it harder to qualify. But this response would simply replace one kind of exclusion with another.
In any case, we rather doubt that the BAA considers the early sellout a problem. Demand for Boston Marathon bib numbers has always outpaced supply; only the size of the gap has changed.
For More: BAA—Boston Marathon