[Updated 2/6/2023] Yes. About 99% of the time, a Twitter block is equal to a shop ban. If I haven't enforced the ban and a blocked user has been able to buy items from me, this is only because I haven't been able to confirm a link between the offending Twitter account and a real person. That, or they are evading detection through various means. I only use the Block function on people I want nothing to do with, and usually for hostile and/or illegal behavior, whether it is against myself, other makers, or community members. It isn't easy to accidentally block a person, but you may contact me via e-mail to confirm if you want to be certain that the Twitter block was not in error. Just be aware that if I have actually banned you, I may decline to comment further and will only confirm the ban, nothing more. The types of people that I am forced to ban are not the sort that are likely to accept an explanation or alter their behavior, and therefore, I will not engage them in conversation/debate.