BOSTON, July 30 -- Massachusetts put its lottery online Monday, giving residents their first access to digital scratch tickets and draw games after two years of implementation work. The platform launched without ceremony and without the headline drama of a casino opening. What makes the timing worth tracking is what Massachusetts still lacks: a legal online casino market that industry projections put at more than double the revenue the lottery's new digital arm expects to collect in its first year.

The Massachusetts State Lottery debuted Mass. Lottery Online on July 27, powered by Aristocrat Interactive under a five-year revenue-sharing contract capped at 5 percent of gross earnings. The platform offers more than 20 eInstant games with b...