better communication that snowball is incompatible with duo while not having supporter

[crisp forge]

when having snowball selected, the game still lets you click on duo to buy supporter, which can mislead some people into thinking it's compatible

i know this is extremely niche but the thought came to mind

[leaden shadow]

note: iirc duo was properly disabled when snowball was on last year

[crisp forge]

this is specifically about when you don't have supporter

it's only when you select duo (with supporter), then snowball gets locked, but not the other way around

i know all of this because i bought supporter while thinking about this idea wishlist