You can log into it, but not for that price. It'll count against your data.

For what price? $5? The bare server is either 25 or 183 cents cheaper, and the amount of bandwidth used by a month of ssh should be less than 1 cent.

Worry about the disk, worry about things that use gigabytes of bandwidth. But don't worry about it costing extra to log in.

Logging in uses bandwidth

I thought each instance came with 1GB of outgoing traffic per month?