so it is best to have accounts sit for a while not a day after transfer.
Make sure when you transfer you don't have anymore than like 10 million (but you can use the money bypass)
soon as the character transfer successful screen pops up. Unlink your social club immediately after.
skip all the character edits and just join a session. As you join, you will get the rockstar cash gift screen. *YOU MUST UNLINK YOUR SOCIAL CLUB BEFORE THE ROCKSTAR CASH GIFT SCREEN APPEARS*. <-thats the most important part of the transfer.
accept the cash gift and continue to join a session
once in a lobby, don't buy anything (ceo office, yachts, etc)
sign off of gta online.
dont sign back on and buy everything. try to stay off of gta for a while. until the ban wave cools down and you hear less about rockstar banning people, trust me it will cool down eventually.
The only people that get banned are the ones that go on, day after day and transfer with a lot of money.
HOPE THIS HELPS =)