Does Flock of Familiars produce endless wealth in the same manner as Find Familiar

With the most recent Sage Advice errata, find familiar can produce 27.5 gp more in sales of Sprite equipment than its own cost. Unfortunately, it takes an hour to cast and ~25 gp/hr is hardly an impressive amount of gp production.

Flock of Familiars can produce thrice the familiars in one-sixtieth the time, but I’m unsure if the equipment it creates is now permanent, real objects that stick around after the spell ends like with Find Familiar, or if the equipment created will vanish when the spell ends, thus rendering it useless for mass production.

Given that find familiar does, in fact, produce the above-stated wealth, what textual arguments can be made for and against flock of familiars similarly producing piles of equipment?