Can I say “subscribe by Facebook/Twitter”?

Question

I have a website. I have 5 subscription options in my site.

As of now my titles displayed like this:

1. subscribe by email
2. subscribe by rss
3. subscribe using facebook
4. subscribe using twitter
5. subscribe using googleplus

My 3,4,5 title looks long. So can I use "by" word instead of "using"?

I mean like "subscribe by facebook","subscribe by twitter","subscribe by googleplus".

Answer 1

Following FumbleFingers rewording suggestion would be the most sensible thing to do. But let me address your «Can I use "by" instead of "using"» question: While use of by would not break any rules of grammar or meaning and would be commonly understood, I would not choose to use it in the way your examples show. I regard "subscribe using twitter" and "subscribe via twitter" as acceptable and nearly equivalent, but "subscribe by twitter" as awkward. (Via has senses as a preposition of "by way of" and "by means of").