AGPL is exactly the spirit of open source. The license used by bear violates freedom 0. AGPL ensures that freedom 1, 2 and 3 are allowed even in hosted services scenarios.
Freedom 0 the freedom to use the work
Freedom 1 the freedom to study the work
Freedom 2 the freedom to copy and share the work with others
Freedom 3 the freedom to modify the work, and the freedom to distribute modified and therefore derivative works
That is not the spirit of open source, but rather the spirit of free software. The spirit of open source is to effectively have freedom without talking about it.
Gotta love these are zero-indexed. Written by an engineer for engineers.