Personally I am against any form of paid listing.
Grin is however a free project. Anyone can start a fundraising where people can pledge an amounts in USD or BTC, I would just not endorse it or participate in it. I very much doubt we could raise 30k in funding for any listing since many community members like myself are per definition against paid listings.
Also good to mention there might be more idealistic alternatives out there that do not require any listing fees at all. Personally I would favor exploring those options.
See this thread: