CQ, in “Lobbyists Get Lawyered Up”, reports:

“There’s been a huge increase in work in this area — really starting in the fall after S. 1 [the statute’s bill number] was signed into law and building ever since then,” said Joe Birkenstock, a political law attorney at Caplin & Drysdale. “It’s pretty much been nonstop.”

Birkenstock chalks up the demand for legal advice and filing assistance to fear in the lobbying industry of getting snared by the new regulations, not to mention the threat of harsher civil and criminal penalties for transgressions: “No. 1, you’re looking at five years in prison for non-compliance, and that really gets people’s attention.”