[endisneigh]

It was never open source before apple. Rather the binary was freely available to be used. When apple bought them they took it away but continued to support customers with contracts. In that way it was inaccessible until it was open sourced.

[metadat]

Yes, I got bitten by this and will never forget- FDB abruptly shut off public access in mid-2015. Fortunately for me, it only cost half a day to migrate my system to Postgres.