Tether terms of service has now changed from every coin backed by one usd to the below
Every tether is always 100% backed by our reserves, which include traditional currency and cash equivalents and, from time to time, may include other assets and receivables from loans made by Tether to third parties, which may include affiliated entities (collectively, “reserves”). Every tether is also 1-to-1 pegged to the dollar, so 1 USD₮ is always valued by Tether at 1 USD.
Could be the beginning of the slippery slope to fractional reserve so why bother with it . Even if not it shows the danger of centralisation and the powerlessness of holders to do anything about it at least with fiat you could cast a vote at a general election and if enough people agree with you get something done . All you can do with a centralised crypto is sell out or hold on