author here: the Interest Investment is for specific startups that are cash-flow positive (and deemed by an investor to be very likely to re-pay & that would be a valuable asset regardless). I spend most of the year in Colombia, and the challenge I've seen in LATAM is that there many profitable startups that don't necessarily fit the VC model (Ex: they likely won't become $100M companies, but they will be profitable). However, many of these companies do need capital to grow quickly & yet they don't have the credit to do so via traditional banks. The idea for is that investors interested in being involved with the tech scene can invest and receive more predictable returns (that they are used to, most emerging market investors aren't familiar at all with tech investments) and cash-flow startups can find a new avenue to grow.