Abilities that allow casting cards/spells by paying something "in addition to their other costs" may be bugged with alternate costs

Some cards enable other cards/spells to be cast by paying some cost in addition to their other costs. I'm concerned that the code used to support this ability might not properly account for alternate costs that could be paid, such as overload.

[Scryfall search for 6 affected cards](https://scryfall.com/search?q=o%3A%2Fmay+cast+%28%3F%21%7E%29.*+other+cost%2F+f%3Av&unique=cards&as=grid&order=name)