just gonna note that +50 bond is better in almost if not every normal free quest than running your personal teatime.
the highest free quests generally get is 815 bond per run, and 5% of that is 40.75. The 5% from native teatime is actually a waste of party cost since you can get more bond out of one of these.
additionally, in very low level free quests, like bone farming in fuyuki, X-C and X-D, two of the top three bones/ap nodes in the game, give 35 and 55 bond respectively. in those cases, +50 bond directly is better than anything you’d ever get from percentage based CEs. (in this case, the same is also true for master exp and mystic code exp, so keep some promo ces around)
definitely a niche thing, but there’s value to gain from pure +50 bond.