MailPoet eat CPU Usage , calls 870 times in Single page

when i check from my ssh

strace php5 index.php 2>&1 | perl -ne 'if (/plugins\/([\w\d-_]*)/ ) { print "$1\n" }' | sort | uniq -c | sort -n

it shows

112 wti-like-post
124 updraftplus
145 widgets-reloaded
158 wp-user-avatar
171 wordpress-seo
205 wp-show-ids
220 wp-pagenavi
228 better-wp-security
276 shortcodes-ultimate
280 w3-total-cache
364 contact-form-7
870 wysija-newsletters

How can mailpoet calls 870 times?
it really takes eat much CPU on my host

Thanks for your time

https://www.ads-software.com/plugins/wysija-newsletters/