Choose Daily if you want one page in the current edition for US$1. Its visibility begins only after payment and approval and ends at the next 00:00 UTC reset; it is not a guaranteed 24-hour placement. This can suit a timely announcement or a first, focused publication.
Choose Weekly if one message will stay accurate for seven days. For US$7, the same approved page enters seven consecutive UTC editions starting the day after approval. Each edition has its own votes. The creative is locked after approval, so check dates, claims and the destination before submitting. Neither Daily nor Weekly renews automatically, and neither buys a better rank.
Sponsor Week is a different US$14 placement: an approved advertisement appears in a labelled sponsor space for seven days from approval, outside the voting directory. Active sponsors share the space; it does not come with exclusive placement or guaranteed views and clicks. If you mainly want to be part of the community edition, choose Daily or Weekly instead.