I've been reading up on this here and on Bogleheads
https://www.bogleheads.org/forum/viewtopic.php?t=410277 with lots of interest.
I have 3 concerns:
1) The 5 year lockup period would basically push out accessing traditional / rollover IRA funds to 10 years in a scenario where someone is building a Roth IRA ladder. 5 years of not withdrawing or converting to Roth without risking the transfer bonus in the traditional account, plus 5 years after a conversion of traditional to Roth before it can be withdrawn penalty free. Niche concern, but relevant for this sub.
2) If you are transferring in mutual funds, from say Vanguard, you'll first need to sell those because Robinhood can't transfer in mutual funds. So when you consider the settlement period of selling mutual funds, plus the ACAT transfer period, you could conceivably be out of the market for a bit and easily see the market go up 3% during that time. Possibly mitigated by first buying the ETFs equivalents in the old account before initiating the transfer. Curious if anyone has had Vanguard convert a mutual fund to the ETF equivalent for them without a settlement period??
3) This seems like a pretty telegraphed play by Robinhood to look more attractive for someone to buy the company. So I'm guessing this won't be hassle free and you might not like where you end up being custodied by the end of it.
But, the return on hassle still intrigues me. I could transfer in 4 accounts (his & her Roth + traditional) and make over $18k, all while staying under the $500k SIPC insurance threshold for each account.