Comment on the Blockchain feature listed here: https://help.zoho.com/portal/en/kb/zoho-sign/admin-guide/articles/blockchain-based-timestamping#How_do_I_enable_blockchain_timestamping_in_Zoho_Sign

Why use the bitcoin blockchain thorugh https://opentimestamps.org/ and not just use other good networks like ETH, Solana, Polygon or Fantom?

I get ETH is expensive, but the other network are legit and cheaper.

I am curious of why this business decision by the way. Also, best feature out there, should be more marketed.