[foul]

If you say "shady" because CEO is a Russian in Dubai and for years nobody really knew how the hell could he sustain the company, yeah you're right.

About the FOSS alternatives you're right, but to use a closed source SaaS is just a choice people make because they are not confident in their own infra.

If it's "shady" because of cybercriminals, I insist in saying that it's the same than using Discord (pedophile rings) or Whatsapp/Meta messenger (extensive history of terrorists, gangs, traffickers of any kind).