Final answer:
Benjamin got involved with entering sweepstakes after hearing stories from an agent about people who had won fortunes through the lottery. These stories convinced Benjamin to try his luck.
Step-by-step explanation:
Benjamin got involved with entering sweepstakes through various stories and experiences he heard from an agent. The agent shared tales of people who had won fortunes from playing the lottery, including a poor newsboy, a man who tragically died before his number won, and a milliner who had played for years before winning. These stories enticed Benjamin to try his luck, believing that the lottery was a great charity and a chance for the needy to improve their lives.