this particular dev's opinion is "BTSX namespace is ruined and that's ok". We have another DAC for that. What is your opinion about the state of gmail's namespace?
I may have misinterpreted the question.
Gmail, can no longer market convenient user accounts as a primary selling feature as the majority of favourable account names have been taken. If micro-payments were possible and a new significant mail service was launched, I think there would be some value in monetising certain forms of account names even for an email address, particularly for businesses. (As they use them to interact with customers)
As demonstrated by your concern about people sending funds to Toast by mistake. Canonizer wanting their account name. & the problem demonstrated in practice with people sending funds to the incorrect Bter in this thread, I personally believe BTSX account names have more value than say Gmail. (Again as they use them to interact with customers, and for money in this case, like bter, unlike Riverheads Scottrade name.)
I personally believe many online businesses and in future even my local restaurant/hardware store/plumber/individual users, when it comes time to pay by BTSX or BitUSD would prefer an account name that matches their business/taste and they would be willing to pay a small premium for it.
I also think we can market it as a unique feature for the first 24 months that a lot of favourable account names are available, but a $5000 attack could damage that and leave us with about the same level of account names you could expect to get if you signed up for a gmail account today. Ie. Toast7391@gmail.com Which is why I think raising the cost to $0.1-0.25 is good idea.
Edit: I think I read that this can be mitigated some other way though, I forget.
It's just my opinon.