We installed Simple Posher and tried all the features. Compared to Simple Posher's sharing and follow features, PoshMarvel allows you to target buyers and acquire followers more efficiently.
Simple Posher is a browser extension. We were able to install and register without any problems. It has some of the standard features, share, follow, like, activity returner, etc. Making offers to likers and running a sale is missing. There has a single plan of $9.99 per month. The trial doesn't require a credit card.
When a CAPTCHA occurs, it notifies the user. There is no feature to automatically solve. We didn't see any problems with sharing and following, it works as expected. The activity log on the left shows the progress. However, these features are very limited in getting you, new followers. It expects you to know which closets to follow, which searches to run etc. In addition, the extension doesn't stay on top of the page therefore we had to keep clicking the extension's icon at the Chrome bar.