We'd have to know the total numbers of BPs and cornsnakes sold vs the number of large constrictors sold to know what percentage of each are given up or kept irresponsibly. I'm sure the number of BPs and cornsnakes produced and sold is just WAY higher than the number of large snakes produced and sold.

There's a guy in Sioux Falls who produced a clutch of burms last year. I keep seeing his ads on craigslist trying to sell the babies. I can't imagine there are 20 people (not sure how many were in the clutch. Pictures looked like there were about 20) in the state who want to and are capable of keeping a burm :/. And they can't cross state lines, right? I doubt he'll breed again if he couldn't sell the first batch.