I know bikeshedding about names is discouraged, but in the case of signatures, isn't there a desire to evoke a "trust" feeling? It's hard to tie "cheap" to "trust". Some other synonym like "eco" might project trust better.
I agree, the name seems antithetical to the concept that the brand really needs to get across, of a solid, trustworthy organisation serving as a proxy for obtaining legally valid signatures.
There’s nothing wrong with leading with the marketing message that this is a cheaper solution than the competition but the brand of the service still needs to evoke trust.
Luckily it looks like they have a bit of time prior to launch to consider whether this is something they may want to change.