Only work with the very best banks for this tradelines program. The banks need to be reliable when posting authorized user (AU) data to people’s credit reports. Preferred banks are: Barclays, Discover, Capital One, Chase, Bank Of America (Note Barclays allows 6 AUs per account whiles others allow 2 AU per account.
I tried to apply to new cards more for the long term future (5+ years) you might get a big credit line that gets $100 per AU. I applied in the following order: