Are you absolutely sure about that? There are several other services at $20/month that would offer a much more compelling value proposition compared to Digital Ocean's lowest-tier droplet.

I would definitely have signed up for a competitor if DO droplets cost 400% what they do now. As other commenters have said, this space is a brutal race to the bottom in pricing. DO is great, I might pay 50% more for their current services, but not 300% more.