Sen. Héctor Joaquín Sánchez By THE STAR STAFF Sen. Héctor Joaquín Sánchez said Thursday that the Puerto Rico Senate will open an investigation into companies that promote property raffles on social media, a practice that has expanded rapidly amid growing concerns about consumer protection. In a radio interview, the senator noted that while some businesses comply with regulations from the Department of Consumer Affairs (DACO by its acronym in Spanish), others appear to be operating without…