To be able to have multiple Instagram accounts is good for those users who happen to have more than a single account. Perhaps one would want to carry a professional account, while keeping the other one as a social account? The brief availability of this multiple user Instagram account has been revealed, albeit for a while, although it happens to be available to Instagram beta testers still.
Instagram has remained mum on why they decided to revoke this feature, but we are keeping our fingers crossed that Instagram has not forgotten about this feature, and will be working hard to roll it out to the masses. The sooner, the better, too. Recently, we have also heard that Instagram has gotten strict with its API access.