This is normal lead generation and mail sequences management tool. Many regular businesses use it for day to day work. As any other tool on the net some may misuse it for something cheeky. But it's totally normal tool, like LinkedIn or Xing or many others.
Word-salad domain names, some promoting others, can't decide on a business name or exactly which business he's doing; so the most you can expect is that his customers will be promoted by eroticised spam, if they are promoted at all.
Risks: tracking, spam, fraud, identity theft.
Do not provide any financial or personal data.
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