Costa said it was exciting to be at Amazon in the early years, but described the culture as "intense" with a heavy rate of corporate employee turnover due to excessive firings.
She said her therapist asked her if she was in a social experiment after she got pregnant and suggested she may have been the first employee in her organization to have a child.
She re-joined the company in 2014 and eventually was promoted into a principal user experience design role.
[5][9] On April 11, 2020, Costa was discharged by Amazon after she had amplified an initiative led by Cunningham to organize employees involving concerns about warehouse workplace conditions involving the COVID-19 pandemic and tweeting that she would match donations to organizing employees in the group Amazonians United.
[15] Costa announced her candidacy for the Seattle City Council's District 1 seat ahead of the 2023 election.