This makes me wonder if Twitter is ever going to crack down on these spam accounts, or put in place some preventive measures. Right now it's really encouraging

This makes me wonder if Twitter is ever going to crack down on these spam accounts, or put in place some preventive measures. Right now it's really encouraging for spammers to create these accounts and sell their services. There's still lots of room for improvement in these bot accounts, currently they're still too easy to detect.