The font used in not the Montserrat, also different background colors have been used.
For a Spreadcoin brand to be instantly recognisable the font and colors should be used consistantly.
I am not sure that using the spreadcoin font is the best way, in this case.
When I look at most "accepted here" buttons out there, it seems there are two or three designs that seem to have become the universal standard.


It would be best to have our "accepted here" designs be as close as possible to the standards set by bitcoin etc.
If I have a website where I accept multiple coins, I probably want my buttons to all look the same and look uniform when put next to each other.
And nr.5 looks close to another widespread design I saw elsewhere.