As far as we know, yes.
As for how exactly, we have no proper data. There is fragmented data like "I did 100 runs with and 100 runs without, and there was a small increase with" but...
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Thank you for the input on the Asherah question. Water isn't my main element but I thought it would be good to know if she was worthwhile or not. My only other Water SSR are Aphrodite and Nike Unleashed.
My testing indicates that drop bonuses increase the likelihood of additional chests dropping. Each chest rarity has a minimum and maximum number of chests possible. Drop bonuses increase the chances that you'll get closer to the maximum rather than the minimum. Due to insufficient data, it's not clear if platinum drop rate is affected, but there's a very clear effect on number of bronze chests. If you want to farm Advents efficiently and can do so easily on auto, it's definitely worth having a team equipped with +drop rate accessories.
when was raid weapon able to exchange?
I just forget to claim my raid reward
How messed up am I?
yup they will delete your unused event items,
i got other question, eidolon in my current team, is the one that my friends could use?
To be more specific, the first of each element's Eidolon will be shown to your friends. So if you equip Diabolos in the main slot of team A, then only Diabolos will show in the Dark tab to your friends, even if you had Anubis in other teams. So don't do that.