What are some creative ways you've acquired customers for your product?

I sent a bunch of Twitter Canvas' to YouTubers. Promoting my business:

1 has struck so far. But I hope more will.

500,000 views. 4 Minute Endorsement. £30 Spent.

If you had some recruitment apps or in that nich... You can create pdf/word and register on jobs listing website, when some hr resource view your profile download the pdf/doc you made. and BOOM!