The section that shows usage of words with prepositions in a Bible Word Study needs to be tweaked.
For a study on the word agape, it reports that agape is used with three prepositions (ek, eis, and en) in 6 verses.

Upon inspection, however, it is clear that none of these prepositions are modifying agape in any of these verses.
in 2 Cor 8:7 (which it lists twice for some reason), the object of ek is hmwn not agape.
In 1 Ti 1:5, the object of ek is kardias not agape.
In 2 Th 1:3, the object of eis is allelous not agape.
In 1 Pet 4:8, the object of eis is eautous not agape.
In 2 Co 8:7, the object of en is umin not agape.
These results seem to be based on proximity rather than grammar.