Are you saying that the mere existence of the option of using a non open source license invalidate the provisions in the open source option? That is, if they offered only AGPL, they would be oss but if they offer your choice of AGPL and something non oss, the AGPL option would no longer be oss too? The article you linked does not address this as far as I can tell.

There is also links (https://links-lang.org/). Designed for web but has nice SQL abstractions. It is mostly an academic language though.

Is this normal? I take it you dont normally have to take this many readings in order to administer daily?