Bounties didnt reset when TTK came out, i was stocked up on 10k bounties but honestly with the motes of light being used for Xp theres no reason to stock up anymore unless its for legendary marks... plus the iron banner bounties now are only 5k anyway.
At a guess id say each mote gives around 5 - 10k Xp anyway and i have well over 1k of them.
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Guess it just glitches for me then on ttk. I just stock them up for JumpStart to IB rank and for the marks.