Seems a fair compromise. Almost all users of Sentry.io benefit from the sort of freedom that FOSS is built on. They can control and modify the source that they

Seems a fair compromise. Almost all users of Sentry.io benefit from the sort of freedom that FOSS is built on. They can control and modify the source that they are working with - sentry.io doesn't take away their rights. At the same time, sentry.io does not have to compete against clones which are using sentry's own R&D against them. I much prefer this over more restrictive alternatives.