Well since it's the same domain I'm presuming it's the same person.
https://bitcointalksearch.org/topic/mod-edit-scam-pplns-btc-public-mining-pool-1667999So contact him and tell him to give you 12.5 BTC
https://bitcointalksearch.org/user/analpaper-561397Edit: as per the earlier comment, his bitbucket account is:
https://bitbucket.org/ctubio/Edit2: and just for the record, right now (all simple publicly available commands)
# host solo.mining-pool.io
solo.mining-pool.io has address 208.113.128.181
solo.mining-pool.io has IPv6 address 2607:f298:5:101d:f816:3eff:fe10:fa45
# host btc.mining-pool.io
btc.mining-pool.io has address 208.113.128.181
btc.mining-pool.io has IPv6 address 2607:f298:5:101d:f816:3eff:fe10:fa45
# host stratum.mining-pool.io
stratum.mining-pool.io has address 208.113.128.6
stratum.mining-pool.io has IPv6 address 2607:f298:5:101d:f816:3eff:fefc:987a
# host 208.113.128.181
181.128.113.208.in-addr.arpa domain name pointer ia-tub.io.
# host 208.113.128.6
6.128.113.208.in-addr.arpa domain name pointer apache2-grog.granola.dreamhost.com.
... and the public IO domain web page
http://www.nic.io/cgi-bin/whois?DOMAIN=ia-tub.ioDomain Information
Domain Handle : DOM-295567
Domain Name : ia-tub.io
Domain Status : Live
First Registered : 2015-05-31
Last Updated : 2016-10-25
Expiry : 2018-05-31 ... Redemption Grace Period Ends, 2018-08-30 00:30
Back-order : Available ... Purchase a Back-Order ... (What is a back-order?)
Domain Owner
User ID : NIC-1484841
Contact Name : Carles Tubio
Organization Name :
Street : ERROR: CATALONIA IS NOT SPAIN.
City : Barcelona
State : B
Postal Code : 08011
Country: ES
(All) Contacts
User ID : NIC-1494092
Contact Name : Carles Tubio Terron
Organization Name : Carles Tubio Terron
Street : Aragon 189 1er 2na
City : Barcelona
State : Catalunya
Postal Code : 08011
Country: ES
... and the public IO domain web page
http://www.nic.io/cgi-bin/whois?DOMAIN=mining-pool.ioDomain Information
Domain Handle : DOM-359842
Domain Name : mining-pool.io
Domain Status : Live
First Registered : 2016-01-04
Last Updated : 2016-10-25
Expiry : 2018-01-04 ... Redemption Grace Period Ends, 2018-04-05 00:30
Back-order : Available ... Purchase a Back-Order ... (What is a back-order?)
Domain Owner
User ID : NIC-1484847
Contact Name : Carles Tubio
Organization Name :
Street : ERROR: CATALONIA IS NOT SPAIN.
City : Barcelona
State : B
Postal Code : 08011
Country: ES
(All) Contacts
User ID : NIC-1494092
Contact Name : Carles Tubio Terron
Organization Name : Carles Tubio Terron
Street : Aragon 189 1er 2na
City : Barcelona
State : Catalunya
Postal Code : 08011
Country: ES