The COVID-19 pandemic is making life worse for many startups, but not all. Those benefiting are often taking advantage of the market updraft to add more capital to their accounts. Robinhood, for example, saw usage of its consumer fintech product rise rapidly. Then the company raised a Series F worth $280 million at a new, higher valuation. Another startup has done something similar. Human Interest, a finservices 401(k) provider for SMBs, added $10 million to its Series C today. The company’s Series C round is now worth a total of…