This frames it. 10k satoshi isn't worth it. Which is part of the question, I guess. Are the bots worth it? They are clearly advanced and quick. Must have taken some time and effort to code, precalculate store and query billions of hashes, and require server and electricity costs to keep going. The "most successful" bot paid 85% in transaction fees, so those 90 cents became 13.5 cents...
if it is for making profit then no it is not worth it. it might have been many years ago when these obvious weaknesses (such as key=SHA256(password)) weren't publicly known and a silly idea like brainwallet was hyped up. and it is not just about the fee, it is about the fact that people don't make mistakes like that anymore. not to mention that it is unethical since you would be stealing other people's money!
but it could be as a white hat thing like what Johoe did back in the days with blockchain.info mess-up.
