You can be confident that BoA has done its due diligence and believes there are profits to be had in this venture. BoA's good/best customers won't be affected because they can and will go elsewhere if rates and fees rise - which of course they won't for those premier customers.
Several CC companies like GE Capital have made a fortune by bottom feeding for high risk coustomers and then managing/offsetting that risk through usury rates and computer systems that chase deadbeats to the ends of the earth. BoA feels it can do this or it wouldn't have started this program.
Also, a pilot program allows a company to further mitigate risk and learn as it goes. Qualifications to get a card can be quickly changed going forward as payment data are collected, and credit limits can be reduced for those cards which are believed to carry too much risk.
If the government doesn't step in to halt this practice, competition will force all CC companies to follow suit. Such is capitalism with all its warts.