No, rainbow ticket gachas in the past have typically been $50 regardless. That was the case for:
1. Ticket #1 (7/01 - 7/08): Anemone / Cactace / Cattleya / Dendrobium
3. Ticket #2 (8/12 - 8/19): Fritillaria / Sakura / Mei Plumblossom
5. Ticket #3 (9/08 - 9/17, player-voted): Alpinia / Anemone / Flowering Peach
7. Ticket #4 (9/29 - 10/06): Cherry / Daisy / Dianthus
10. Ticket #5 (10/20 - 10/27): Dendrobium / Ionocidium / Fritillaria